最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

Abstract:利用放電等離子燒結(jié)（SPS）技術(shù)，原位制備Ti2AlC／TiAl復(fù)合材料，并對其進(jìn)行多步熱處理，研究增強(qiáng)相Ti2AlC和微量元素B對Ti2AlC／TiAl復(fù)合材料熱處理組織的細(xì)化作用。研究發(fā)現(xiàn)，在熱處理過程中，Ti2AlC和B能夠顯著抑制TiAl基體中γ晶粒和α2／γ層片晶團(tuán)的長大，有效地細(xì)化Ti2AlC／TiAl復(fù)合材料的熱處理組織。顯微組織的細(xì)化能夠顯著強(qiáng)韌化復(fù)合材料，其中經(jīng)1390℃熱處理的復(fù)合材料的彎曲強(qiáng)度達(dá)到957．9MPa，斷裂韌性達(dá)到20．73MPa·m^1/2。

Abstract:The distribution of the melt flow field under electromagnetic force and gas bubble floatage is already studied by the numerical simulation method for a 3 kA neodymium electrobath. These results will provide the theoretical foundation for further improving and optimizing the structure of electrobath.

Abstract:Rare earth metals have distinct influence on hydrogenation,magnetic and catalytic properties of the Pd-rich alloys.Investigation on the most Pd-rich compounds in the Pd-RE systems is significant.In this work,single phase compounds CePd5,PrPd5 and NdPd5 were prepared by a proper smelting and heat treatment.X-ray diffraction was used to determine their structure and lattice parameters.It is found that the most Pd-rich compound in the Pd-Ce system is CePd5 with the hexagonal CaCu5-type structure,and that in the Pd-Pr and Pd-Nd system is PrPd5 and NdPd5 with the orthorhombic SmPt5-type structure,respectively.X-ray diffraction data for the three intermetallic compounds have been reported.Following lattice parameters have been obtained:a=0.5372 nm,c=0.4178 nm for CePd5;a=0.5278 nm,b=0.9239 nm,c=2.575 nm for PrPd5;a=0.5265 nm,b=0.9219 nm,c=2.570 nm for NdPd5.The stoichiometries and the crystal structures of the most Pd-rich compounds in the Pd-RE systems have been compared with those in the Pt-RE systems.

Abstract:This paper presents the galvanic corrosion behaviors of AM60 magnesium alloy coupled with variable materials(carbon steel,stainless steel,brass and aluminum alloy) in the outdoor atmosphere of Beijing.The correlations among mass variation,galvanic effect and atmospheric factors for AM60 magnesium alloy coupons were investigated.Surface morphologies were observed by scanning electron microscopy(SEM),and X-ray diffraction(XRD) was used to analyze the crystal corrosion products.The results showed that the AM60 magnesium alloy acted as anodic material when it coupled with tested metals.The arrangement order of galvanic effect from strong to little is carbon steel,brass,stainless steel and aluminum alloy after 12 months exposure in Beijing atmosphere.The atmospheric galvanic effect of magnesium alloys coupled with aluminum alloy is the least among the tested coupled alloys during any testing periods because the effective potential difference of the cathode(AM60) and anode(aluminum alloy) is the least for all of tested coupled alloys.The atmospheric galvanic effects in Beijing compared with other cities indicate that atmospheric environment is most important factor.The atmospheric galvanic effects for magnesium alloys are affected by cathode alloy,testing time,sample acreage and environment condition.And no intact and protective corroded products layer was formed to prevent further corrosion after 1 year exposure.The edge of AM60 coupon suffered harsh galvanic corrosion,which was limited by the existing of thin-film on the coupon surface.The high dust precipitation of Beijing could prolong the time of wetness on metal surface.So,the atmospheric corrosion of AM60 magnesium alloy coupled with different metals could be accelerated.

Abstract:When a high frequency alternating current flows through the Co-based amorphous ribbon bended, there is obvious stress-impedance effect due to the stress. A Co-based amorphous ribbon Co66.3Fe3.7Si12B18 annealed with an appropriate pulse current is used in the experiment. The impedance ratio dependence on the bend and the effect of alternating current value and frequency on the stress-impedance of Co-based amorphous ribbon have been studied. The experiment results show that the Co-based amorphous ribbon has obvious stress-impedance effect, and the maximal impedance ratio can reach 25%. The ribbon has negative impedance ratio when the displacement of the end of the elastomer is positive direction, however, it has positive impedance ratio when the displacement is negative direction, but they all increase with the increasing of displacement. The impedance ratio increases firstly until a maximum and then reduces with the increase of frequency at the same displacement. The impedance ratio dependence on the current value also has the same trend.

Abstract:The defects forming mechanism in the Laser Rapid Forming(LRF) process of titanium and titanium alloy was studied through microscopic analysis methods.The results showed that there were two kinds of defects,porosity and ill bonding in the laser multi-layer cladding.For the LRF titanium and titanium alloy,the porosity was spherical and randomly distributed in samples due to the low loose density of the powders,and the oxygen content wasn't the factor to influence the porosity rate.The ill bonding tended to be irregular shape and generally occurred between the layers and the line boundaries.The laser energy density,overlap and Z-increment ?Z were main process characteristic parameters to influence the ill bonding.

Abstract:采用微觀測試分析方法對沉淀增強(qiáng)型鎳基高溫合金Rene88DT激光快速成形裂紋產(chǎn)生機(jī)理進(jìn)行了研究。發(fā)現(xiàn)裂紋為液化裂紋，具有典型的沿晶開裂特征。激光快速成形過程中，沉積當(dāng)前層時，已經(jīng)凝固的前一層沉積層經(jīng)受再熱循環(huán)，晶界處的γ／γ′低熔共晶發(fā)生液化，在隨沉積過程進(jìn)行而逐漸增大的殘余拉伸應(yīng)力的作用下被拉開，形成液化裂紋。激光成形件組織具有典型的外延柱狀生長特點，沉積層底部為近似平行于沉積方向的細(xì)長枝晶，其頂部由于熱流方向改變枝晶發(fā)生轉(zhuǎn)向，在沉積下一層時，道與道之間的搭接區(qū)容易存在轉(zhuǎn)向枝晶未熔的區(qū)域，因此生長方向偏離沉積方向一定角度的枝晶在搭接區(qū)交匯形成晶界，使得該區(qū)域成為開裂的敏感區(qū)域。柱狀枝晶的晶界沿層與層之間具有貫通的渠道，液化裂紋一旦形成就會沿晶界迅速擴(kuò)展，因此裂紋大體沿道與道之間措接區(qū)域發(fā)展。

Abstract:通過熱-機(jī)耦合彈塑性模型，采用有限元分析軟件MSC.Marc，對純鎂旋鍛過程進(jìn)行了模擬，著重分析了鍛模圓錐進(jìn)料角α對旋鍛變形應(yīng)變場的影響。結(jié)果表明：隨α增大，各節(jié)點變形所需脈沖鍛打次數(shù)減少，而每次鍛打的應(yīng)變量增加，因而小圓錐進(jìn)料角有利于低塑性材料的變形：隨圓錐進(jìn)料角α增大，應(yīng)變沿工件徑向分布趨于均勻，且α增大到一閾值αTres后，繼續(xù)增大不再對應(yīng)變的徑向分部產(chǎn)生影響，在本模擬的工藝條件下。αTres=21°40′：工件外表面應(yīng)變沿軸向分部呈脈沖似波動，且隨α增大，波動的振幅增大：在本模擬的工藝條件下，9°30′≤α≤21°40′是合適的。實驗結(jié)果與模擬結(jié)果吻合較好。

Abstract:利用機(jī)械合金化方法制備了Mg-3Ni-2MnO2氫化物儲氫材料，并對其吸放氫動力學(xué)性能進(jìn)行了測試：利用Avrami指數(shù)研究了儲氫材料吸放氫過程中相轉(zhuǎn)變行為特征，利用形核長大理論建立其本征吸放氫動力學(xué)方程，并進(jìn)行了計算。結(jié)果表明：利用機(jī)械合金化方法能夠制備具有良好吸放氫動力學(xué)性能的儲氫材料：200℃，2．5MPa條件下需要約65s的時間完成吸氫，吸氫量為6．23％（質(zhì)量分?jǐn)?shù)），300℃，0．1MPa條件下完成充分的放氫需要約550s的時間。吸氫過程Avrami指數(shù)約為0．5，其相變的主要過程為盤狀氫化物沿厚度方向的生長：放氫過程中，根據(jù)Avrami指數(shù)的變化。其相轉(zhuǎn)變特征為形核長大階段、新相繼續(xù)穩(wěn)定長大階段（無新的晶核形成）。動力學(xué)方程計算結(jié)果與試驗曲線能較好的吻合：溫度和壓力對吸放氫動力學(xué)性能都有影響。

Abstract:通過掃描電鏡原位拉伸實驗，動態(tài)跟蹤觀察了2種非金屬夾雜物對FGH95合金裂紋萌生和擴(kuò)展的影響規(guī)律。結(jié)果表明，裂紋在夾雜物處萌生，塑性莫來石類夾雜的尖角處，是裂紋萌生的擇優(yōu)位置。在最大正應(yīng)力和最大剪應(yīng)力的作用下，裂紋沿與主應(yīng)力軸垂直或約45°向夾雜內(nèi)部擴(kuò)展。當(dāng)裂紋擴(kuò)展到基體中之后，呈鋸齒狀向基體內(nèi)擴(kuò)展，但主裂紋所在平面仍與主應(yīng)力軸垂直，其尖端變形帶內(nèi)有明顯的滑移線出現(xiàn)。夾雜物附近基體中的貧γ′相區(qū)，斷口呈韌性沿晶斷裂，而遠(yuǎn)離夾雜物的基體處則變?yōu)榇┚嗔选?/p>

Abstract:Bulk amorphous Cu52.5Ti30Zr11.5Ni6(at.%) alloys up to 5 mm in diameter were fabricated by a copper mold casting method.The critical cooling rate was determined to be 126.8 K/s by using the Barandiaran-Colmenero expression.Based upon the Jackson-Hunt relation,the cooling rate for the formation of devitrified structure was also evaluated.In the cooling range of 10 K/s ~ 120 K/s,there exists a mixed microstructure of primary metastable phase and eutectic structure.With further decreasing of cooling rate(below 10K/s),the precipitation of metastable phase was depressed,and the growth mode also deviates from the eutectic mode.

Abstract:In this paper,the atoms diffusion and growth behavior of intermetallic compounds(IMCs) on the Sn-Ag-Cu/Ni and Sn-Ag-Cu/Cu interfaces under the thermal-shearing cycling condition were investigated.The results showed that two kinds of IMCs,(CuxNi1-x)6Sn5 and(NixCu1-x)Sn3,formed on the Sn-Ag-Cu/Ni interface,but only Cu6Sn5 IMC layer formed on the Sn-Ag-Cu solder and Cu interface under the thermal-shearing condition of 720 cycles.The morphology of(CuxNi1-x)6Sn5 and Cu6Sn5 IMCs varied from scallop-type to planar-type with increasing the thermal-shearing cycling periods,while(NixCu1-x)Sn3 IMC formed surrounding(CuxNi1-x)6Sn5 IMC after 200 cycles.The IMC thickness increased with the increasing of thermal-shearing cycling periods by a role of parabolic growth kinetics,it implied that the IMC growth was controlled by Cu atom diffusion.

Abstract:In this paper, Ti/IrO2-Ta2O5 anodes with different ratios of IrO2 were prepared by thermolytic decomposition method for sulfate electrolysis. The structure and morphologies of the oxide films were determined by XRD and SEM, respectively. Linear Sweep Voltammetry, Tafel Plot and Cyclic Voltammetry were used to characterize their electrochemical activities of oxygen evolution. Test results show that the iridium and tantalum could form solid solution structure. The mutual solubility between iridium and tantalum is affected by the ratio of Ir/Ta in coating solution and influences the dimension parameters of IrO2 crystals. The finer IrO2 crystallites increase on the coating surface and the electrocatalytic capability of oxygen evolution is strengthened with the increasing of IrO2 content in the coatings. When the content of IrO2 is too high, the coating adhesion and rigidity would decrease which affect electrochemical activity of the anode. The electrochemically active surface area is determined not only by the content of IrO2, but also the structure and morphology of the anode coatings. It is probably due to the existence of proper quantities of inert Ta2O5, resulting in a typical morphology of cracks and solid solution structure. The solid solution structure is helpful to prolong the anode service life. The morphology of cracks could perhaps improve the anode active surface area and the electrocatalytic activity of oxygen evolution.

Abstract:Ti-Fe alloy nanometer powders with particle size between 5 nm~30 nm were prepared by gas evaporation with arc as a heating source.The formation regularities of the phases and the melting point of the powers were investigated.The results indicate that the as-formed alloy phases in the nanometer powders are different from that in the Ti-Fe equilibrium phase diagram.FCC and TiFe2 phases were easily obtained when the master alloy rich in Fe was evaporated;by contrast,we gained FCC and TiFe phases when the master alloy rich in Ti were evaporated.The relative amount of the FCC phase is always the highest in all the powder samples.As the component of Fe in the master alloy is 53wt%,the relative amount of FeTi phase in the as-prepared powder was the highest among all the samples.A little amount of Ti phase was detected in the nanometer powders only when the Fe10Ti90 master alloy was evaporated due to the formation of the FCC phase.The lattice spacing of d(111) plane of FCC phase increased with the increase of Ti amount in the master alloys,which confirmed the solution of the Ti in the phase.The DSC curves showed that the mean melting points of these nanometer powders were lower than that of the as-formed alloy phases at equilibrium state.

Abstract:Diamond-like carbon(DLC) films were fabricated on NiTi alloys using plasma immersion ion implantation and deposition(PIIID).The surface morphology and roughness were analyzed by atomic force microscopy(AFM).The film microstructure and hardness were characterized by Raman scattering spectroscopy and nano-indentation system,respectively.The corrosion resistance in Hank's solution was evaluated by mean of potentiodynamic polarization techniques.The surface morphology of the samples was observed using scanning electron microscopy(SEM) after potentiodynamic polarization tests.The Ni ions release from the NiTi alloys was measured by atomic absorption spectroscopy(AAS).It is shown that the roughness and hardness of the NiTi alloys is reduced and increased by DLC film,respectively.The DLC films markedly improve the corrosion resistance of the NiTi alloys and effectively prevent the Ni ions dissolution from the substrate.

Abstract:開發(fā)了Al-K2ZrF6體系熔體反應(yīng)法合成原位鋁基復(fù)合材料，采用XRD，SEM和TEM分析了復(fù)合材料中相組成、微觀組織和界面結(jié)構(gòu)。實驗結(jié)果表明：合成的增強(qiáng)相為Al3Zr顆粒，常規(guī)金屬型鑄造的復(fù)合材料中其尺寸在3μm～4μm左右，一般成聚集態(tài)分布，顆粒形貌基本為長方體狀：該復(fù)合材料經(jīng)重熔快淬成形后，顆粒尺寸減小，基本為粒狀，并彌散分布于基體上。Al3Zr／Al復(fù)合材料的界面結(jié)構(gòu)研究表明，Al3Zr顆粒與Al存在一定的晶體學(xué)位向關(guān)系：[^-2^-21]Al3Zr∥[100]Al，（012）Al3Zr∥（1^-10）Al，其點陣錯位度僅為10．87％，這表明Al3Zr顆?？勺鳛榛wAl相的形核襯底。Al3Zr／Al復(fù)合材料的力學(xué)性能測試顯示，當(dāng)Al3Zr顆粒體積分?jǐn)?shù)為11.2％時，抗拉強(qiáng)度和屈服強(qiáng)度分別為148．7MPa和110．2MPa，而且Al3Zr／Al復(fù)合材料的抗拉強(qiáng)度和屈服強(qiáng)度均隨顆粒體積分?jǐn)?shù)增加顯著提高。

Abstract:In this paper,the low-cycle fatigue fracture crack growth is investigated gropingly for Zr-4 alloy(Zircaloy-4).By analyzing the trend of patulous energy and fractal dimension in the crack growth direction,three stages(A-B,D-E,and F-H) of different energies and fractal dimensions are discovered in the growth period of dynamic crack.The normalized energies are 0~0.0156,0.8754~0.9652,and 1 for the A-B,D-E,and F-H stages,respectively.But for the fractal dimension,it is in the middle for the A-B stage,its mean value and standard deviation in LL and LH directions are 2.2796,0.0277 and 2.4516,0.0592,respectively;and it is minimal for the D-E stage,its mean value and standard deviation in LL and LH directions are 2.2214,0.0131 and 2.3477,0.0550,respectively;it is maximal for the F-H stage with the mean value and standard deviation in LL and LH directions of 2.3414,0.0704 and 2.5398,0.0263,respectively.Finally,the phenomena were studied on the morphology of low-cycle fatigue fracture by SEM for Zircaloy-4.

Abstract:采用熔體快淬制備NdFe二元合金甩帶，獲得較細(xì)的納米晶，經(jīng)粉碎及處理后，采用體積比為50％的含量與石蠟混合，進(jìn)行2GHz～12GHz頻段的電磁性能測試，獲得了較好的微波電磁性能，其中Nd8Fe92在2GHz處μr=4．5-j2．2，εr=128-j45，當(dāng)厚度為1．2mm，分別模擬得到微波頻率在4GHz附近反射率衰減為-8．5dB（86％的能量損耗），在2GHz附近衰減為-5．8dB（75％的能量損耗）的性能。模擬后可根據(jù)不同頻率需要設(shè)計成在一定厚度和Nd元素含量比的微波吸收材料。

Abstract:采用草酸根沉淀稀土粒子使其充分混合進(jìn)行前處理，用固相反應(yīng)合成了硼釩酸釔釓銪稀土熒光紅粉。對試樣進(jìn)行了X射線衍射、光致激發(fā)和發(fā)射光譜表征。產(chǎn)物與（Y，Gd）VO4：Eu相比，摻入了與釩等摩爾量的硼，硼的摻入提高了發(fā)光強(qiáng)度，但沒有改變釩酸鹽的四方晶系結(jié)構(gòu)。分析了不同濃度Gd^3＋摻雜對試樣發(fā)光強(qiáng)度的影響以及基質(zhì)離子VO4^3-和BO3^3-對激活劑Eu^3＋的能量傳遞機(jī)理。同時將產(chǎn)物與（Y，Gd）VO4：Eu和（Y，Gd）BO3：Eu的發(fā)光性能進(jìn)行對比，發(fā)現(xiàn)（Y，Gd）-（BO3，VO4）：Eu具有更好的發(fā)光強(qiáng)度和色純度，有望在工業(yè)上作為一種優(yōu)良的新型燈用或PDP顯示器用熒光粉。所用方法與傳統(tǒng)固相法相比，反應(yīng)溫度降低了100℃，所得試樣易粉碎、粒度細(xì)，發(fā)光強(qiáng)度提高10％以上。

Abstract:采用熱分解法制備了鈦基二氧化錫電極，并用XRD，SEM對電極涂層進(jìn)行了表征，應(yīng)用快速電極壽命法測試了鈦基二氧化錫電極在60℃，1．0mol/L H2SO4溶液中的使用壽命。以降解苯酚為目標(biāo)，用循環(huán)伏安法考察了該電極的電催化氧化性能。結(jié)果表明，苯酚轉(zhuǎn)化率達(dá)到96．5％，其電催化性能優(yōu)于傳統(tǒng)單質(zhì)鉛電極和Ti／PbO2電極，是1種優(yōu)良的電催化劑。

Abstract:以自制高純乙醇鉭為原料，通過水解、干燥與煅燒生產(chǎn)粒度約35nm的高純Ta2O5納米粉。研究了水解過程中乙醇鉭濃度、溫度、加料時間對產(chǎn)品粒度的影響以及煅燒溫度與時間對Ta2O5晶形的影響。選取水解最佳條件為：乙醇鉭濃度1.0mol／L，水解溫度50℃左右，加料時間約15min。加完后，攪拌5min，接著加入氨水溶液調(diào)節(jié)pH值到8～9，同時升溫至80℃-85℃保溫30min；煅燒溫度800℃，時間2h。得到的Ta2O5產(chǎn)品粒度約35nm，純度〉99．997％。

Abstract:The static and dynamic mechanical properties of the 93WNiFe heavy alloy improved by adding rare earth elements of La and Ce with different contents have been studied in this paper. The results show that the mechanical properties, especially the dynamic mechanical properties, can be improved by the addition of a small amount of La and Ce for the tungsten alloy due to the reduction of the segregation of oxygen and sulfur at the interface between W grains and matrix and the reduction of the contiguity of W grains. The reasonable adding content of rare earth is 0.10%-0.15%.

Abstract:采用Yb／Co氫氧化物共沉淀包覆方法和Ca3（PO4）2與Co（OH）2分別沉淀分層包覆方法在球形Ni（OH）2的表面進(jìn)行了均勻的包覆。前者利用COSO4，YbCl3和NaOH溶液進(jìn)行共沉淀包覆，后者是先在球形Ni（OH）2的表面沉淀包覆Ca3（PO4）2，然后再沉淀包覆Co（OH）2。結(jié)果顯示，兩種包覆方法均能有效地提高球形Ni（OH）2的高溫（60℃）性能。按照Yb／Co=0．75％：2％共沉淀包覆的試樣制成AA型電池后，在60℃下1C放電的容量保持率達(dá)到常溫下的90％。而2％Ca3（P04）2與2％Co（OH）2分層包覆后的球形Ni（OH）2制成AA型電池后，在60℃下1C放電的容量保持率達(dá)到常溫下的81％。未包覆和僅用Co（OH）2包覆的球形Ni（OH）2制成的AA型電池，在60℃下1C放電的容量保持率分別只有46％和48％。通過循環(huán)伏安測試表明，利用表面包覆的方法可以增大正極材料Ni（OH）2在高溫下的氧化電位、析氧電位和兩者之間的電位差，從而提高了材料在高溫下的電化學(xué)性能。

Abstract:Al/Ni clad composite metal is widely applied as the external terminal of battery under the demands of both high bonding strength and low hardness of nickel layer.A better solution to the contradiction of bonding strength and controlling hardness of nickel was successfully got by adopting a controlled-atmosphere hot-bonding technology for the clad composite metal strip.The mechanism of controlled-atmosphere hot-bonding and the effects of microstructure transformation near the bonding interface on the bonding strength during annealing process were discussed in this research.The results show that:(1) the thermal activation of two metals interface can be explained by the mechanism of bonding;(2) the satisfying properties of final product can be attributed to the lower critical rolling reduction for bonding by the new technique;(3) the temperature is more important for annealing parameters to optimize the technique and to avoid the damage of intermetallic compound.

Abstract:利用波長1．06μm的激光對U-2Nb合金進(jìn)行了表面熔化處理。結(jié)果表明；U-2Nb合金激光熔化層的顯微硬度（HV）由處理前的2900MPa提高到3300MPa；合金基材為雙相（α＋γ）珠光體，經(jīng)激光處理后變成馬氏體（α′），激光處理能細(xì)化顯微組織，使Nb元素實現(xiàn)均勻分布。陽極極化試驗與質(zhì)量法腐蝕試驗表明：激光處理能明顯提高合金的抗腐蝕能力，在FeCl3·6H2O溶液中激光處理后合金的失重僅為處理前的1／5。

Abstract:ZnS nanoparticles and one-dimensional nanocrystals were obtained by in-situ synthesis in Aa-AMPS-hT ternary periodic copolymer by ion complexometry and self-assembly method. The micro-morphology, structure and optical properties were characterized by TEM, SED, UV-vis spectra and PL spectra. The results show that the products are hexagonal ZnS nanocrystals with 15 nm-215 nm in diameter. The morphology and dimension of ZnS nanoparticles could be controlled by varying the sulfuration time. The UV-vis absorption spectra indicate that the absorption edges are blue-shifted by shortening the sulfuration time, exhibiting a marked quantum size effect. With shortening sulfuration time, the photoluminescence emission peak of 409.8 nm is blue-shifted, which could be ascribed to be the forbidden gap emission .

Abstract:An experiment was carried out on the blend of metal power 316L/binder under steady and dynamic molding conditions using the self-made electromagnetic dynamic injection machine DPII-90.The effects of vibration parameters on the uniformity and densification of metal power 316L/binder were studied.Results show that the density of green parts under dynamic molding conditions is obviously higher than under steady molding conditions.The increase of green parts's density is nonlinear under a given frequency(or amplitude) with the increase of amplitude(or frequency).The density decreases slightly as it reaches to a max value.The densification of green parts is better in the frequency range of 7 Hz~10 Hz and vibration amplitude range of 0.05 mm~0.15 mm.SEM showed that the change of uniform dispersion and distribution is basically accordant with the change of density with vibration amplitude(frequency).

Abstract:采用國產(chǎn)3Y-TZP亞微米粉體，通過雙向模壓結(jié)合等靜壓成形有效克服了條形試樣的燒結(jié)彎曲，探討了24h排膠工藝對預(yù)燒試樣力學(xué)性能的影響，通過對預(yù)燒試樣熱膨脹曲線的測定、不同燒結(jié)溫度試樣力學(xué)性能和密度的比較及XRD定量分析確定了適宜的燒結(jié)工藝。結(jié)果表明，牙科支架用陶瓷，將預(yù)燒試樣升至1550℃保溫0．5h，排膠工藝對預(yù)燒試樣的抗彎強(qiáng)度和斷裂韌性并無顯著影響，對于即可獲得足夠的抗彎強(qiáng)度，提高其斷裂韌性。

Abstract:Porous Palladium materials have great importance in the storage, recycle and application of hydrogen isotopes. In this paper, porous Pd materials processed by a newly applied sintering-resolving technology are studied. The microstructures of the porous Pd materials are characterized by FESEM. In addition, their hydrogen isotopes displacement and mechanic properties arc studied. The results show that porous Pd materials with a porosity range from 85.29% to 87.82% can be stably processed by sintering-resolving technology. The compressive strength of the porous Pd materials exceeds 2 MPa. The deuterium absorption amount of the porous Pd material with a porosity of 87.3% is 0.0767 L/g and its hydrogen isotopes displacement ratio is 86.2% at room temperature.

Abstract:The effects of adding BaF2 on the thermodynamic behavior of YBCO precursory powders,melt-textured microstructure and properties of YBCO superconductors have been investigated.The differential thermal analysis(DTA) results showed that the peritectic decomposition and reaction temperature of YBCO precursory powder were lowered when BaF2 is added,but the temperature range for melting texture growth did not significantly change by the addition of BaF2.The microstructures of the doped samples have been observed by scanning electron microscopy(SEM).The results show that the appropriate addition amounts of BaF2 were not affect the microstructure of YBCO and the distribution of Y211 in the matrix.The transition temperature Tc was measured by susceptibility method without obviously decrease for the samples with an addition amount lower than 10wt% of BaF2.

Abstract:采用HDDR工藝制備出了各向同性Sm2Fe17Nx永磁粉，通過XRD，SEM，EDX等手段研究了Sm-Fe合金的凝固，均勻化熱處理，氫化-歧化以及脫氫-再化合和氮化等過程中，合金的相及微觀結(jié)構(gòu)的變化。結(jié)果表明：1050℃，24h的均勻化熱處理能有效地消除合金中的雜相，成功地制備出成分均一的單相2：17母合金：800℃氫化-歧化1h后，合金歧化成晶粒為納米級SmHx和α-Fe，相同溫度下脫氫-再化合2h后，合金又再化合為晶粒細(xì)小的2：17相，500℃氮化5h后，合金大量吸氮，晶格常數(shù)和單胞體積明顯增加，體積膨脹量達(dá)6．28％；將上述制備的各向同性Sm2Fe17Nx永磁粉用質(zhì)量分?jǐn)?shù)為3％的環(huán)氧樹脂粘結(jié)劑均勻包縛，獲得了密度為6．04g／cm^3，磁性能為：Br=0．6704T，Hcj=015kA／m，（BH）max=73．7kJ/m^3的各向同性Sm2Fe17M粘結(jié)磁體。

Abstract:采用Ni-Cr-B非晶中間層瞬間液相連接（Transient liquid phase bonding） 一種鎳基單晶高溫合金DD98，TLP連接在1230℃，8h真空條件下進(jìn)行。利用掃描電鏡進(jìn)行微觀組織觀察和成分分析。在不同溫度對接頭與母材進(jìn)行了拉伸實驗。實驗結(jié)果表明：接頭的微觀組織和化學(xué)成分與母材趨于一致；接頭強(qiáng)度達(dá)到母材的標(biāo)準(zhǔn)，其它性能指標(biāo)與母材相當(dāng)，二者的應(yīng)力一應(yīng)變關(guān)系相同。

Abstract:采用高能球磨方法制備了PM304復(fù)合粉末。研究了納米PM304粉末的真空燒結(jié)致密化和顯微組織演化現(xiàn)象，并與未球磨粉末的燒結(jié)試樣進(jìn)行了比較。結(jié)果表明，提高燒結(jié)溫度和延長燒結(jié)時間有利于提高相對密度，同時組織長大。1100℃，2h是最佳燒結(jié)工藝。機(jī)械合金化導(dǎo)致粉末納米化，使真空燒結(jié)后的顯微組織結(jié)構(gòu)明顯細(xì)化，使試樣的相對密度和抗拉強(qiáng)度比未球磨粉末燒結(jié)后的試樣有顯著提高。

Abstract:研究了用分子束外延（MBE）在GaAs襯底上生長GaSb薄膜的工藝。為了減小因晶格失配度較大所引起的位錯密度，采用低溫GaSb作為緩沖層，有效降低了外延層中的位錯密度，提高了晶體質(zhì)量。通過X射線雙晶衍射儀和原子力顯微鏡測試分析，得到低溫GaSb緩沖層的優(yōu)化生長參數(shù)：厚度為20nm，生長速率為1．43μm／h，Ⅴ／Ⅲ束流比為2．0。并在此基礎(chǔ)上研究了GaSb薄膜的發(fā)光特性：GaSb薄膜的光致發(fā)光光譜主要由束縛激子（BE4）和施主-受主對（D-A）輻射復(fù)合發(fā)光峰組成，在50K時其發(fā)光峰強(qiáng)度最強(qiáng)，半峰寬最窄。

Abstract:采用熱分解法制備了一種以離子鍍TiN膜為基體的IrO2＋Ta2O5涂層電極，通過極化曲線、循環(huán)伏安、電化學(xué)阻抗譜等電化學(xué)方法并結(jié)合掃描電鏡、X射線能譜和X射線衍射研究了涂層的析氧電催化活性，并對460℃制備的涂層進(jìn)行強(qiáng)化壽命實驗。結(jié)果表明：涂層呈多孔、多裂紋的顯微結(jié)構(gòu)和多層電化學(xué)結(jié)構(gòu)；制備溫度對涂層表面形貌和電催化活性影響很大；該涂層陽極在保持了高電催化活性的同時，其使用壽命高于傳統(tǒng)Ti基陽極，說明TiN作為此類催化電極的載體是可行的。

Abstract:采用固相法和水熱法制備了BaAl2B2O7：Eu^3＋系列發(fā)光體，研究了制備方法對其光譜特性的影響、助熔劑對發(fā)光強(qiáng)度和微觀形貌的影響、激活劑濃度對發(fā)射強(qiáng)度的影響。研究表明；固相法制備的發(fā)光體Eu^3＋存在621nm的^5D0→^7F2強(qiáng)發(fā)射和772nm的^5Do→^7F5．6弱發(fā)射，通過對多種助熔劑優(yōu)選NaF為最佳的助熔劑，摻雜NaF的發(fā)光體僅在772nm的發(fā)射大幅度增強(qiáng)，說明助熔劑對發(fā)射光譜的特定波長有突出的增強(qiáng)作用：當(dāng)摻雜Eu^3＋濃度較低時和水熱法制備的熒光體在455nm存在Eu^2＋的4f^65d^1→^8S7／2強(qiáng)發(fā)射；此外還研究了BaAl2B2O7：Eu^3＋中Eu^2＋→Eu^3＋的能量傳遞。

Abstract:分別在不同進(jìn)料比、進(jìn)料位置、加熱／冷卻溫度的條件下，對TCAP工藝的全回流模式進(jìn)行了實驗。結(jié)果表明：從回流柱進(jìn)料90％，分離柱加熱／冷卻溫度為290℃／56℃條件下的分離效果最好，40次循環(huán)后分離系數(shù)為2183.87，60次循環(huán)后分離系數(shù)達(dá)到了3055．49，40次循環(huán)后產(chǎn)品端D含量高于99％，尾氣端H含量高于95％；分離柱中點進(jìn)料的分離效果遠(yuǎn)遠(yuǎn)沒有回流柱進(jìn)料的好。另外，高低溫差、回流比對氫同位素分離也有影響，溫差越大，加熱溫度越高，Pd／K解吸出的H含量越高，回流比越大，TCAP分離效果就越好。

Abstract:The preparation technology and development on the single crystals of refractory metals of their alloys were introduced in this paper.Some suggestions have been given on the R&D prospects of processing technology for the single crystals of refractory alloys to enhance the high temperature creep resistance.

Abstract:These is a lot of platinum precious metals(FPs) in the spent nuclear waste,such as Ru,Rh,and Pd.This FPs were generated through nuclear fission reaction in nuclear power reactor.Now in the worldwide,the quantity of FPs in the spent nuclear waste is no less than quantity of precious metals resource in the nature.This number of FPs will continue to increase.In the future,the FPs will be the important resource for precious metals.In this paper,methods of extraction and sate of FPs in the nuclear waste were introduced.The radioactive properties of every species of FPs were all listed.Viewpoints and methods about how to apply and develop the FPs were given in this paper.The applications of FPs in nuclear technology and high purity hydrogen gas production were intruduced,and other potential utilizations of FPs were presented.