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Abstract:High performance NdxFe90.5-x Zr3.0B6.5(x=8.5~11.5)ribbons were produced by arc melt spinning and then annealing.It is found that a proper amount of Nd addition can obviously optimize the magnetic properties of the samples.The energy product of NdxFe90.5-xZr3.0B6.5 ribbons is increased from 75 kJ/m3 for x=8.5 to 114 kJ/m3 for x=10.5 which is closed to that of America MQP-B magnets.In addition,it can be seen that Zr dopants can significantly improve the magnetic properties of the ribbons.

Abstract:The corrosion behavior of sintered NdFeB in nitric acid hydrochloric acid,vitriol,phosphate and oxalic acid was studied.Potentiodynamic polarization curves and corrosion rate of sintered NdFeB in various solutions were tested.The surface morphology of sintered NdFeB corroded were investigated by means of SEM and AFM.The results indicate that corrosion of sintered NdFeB in hydrochloric acid and vitriol is most serious among all acid,and sintered NdFeB is passivated in phoshate and oxalic acid.The brim of sintered NdFeB is corroded rather seriously and the micro dimension was destroyed greatly in nitric acid.Every surface of magnet corroded by above acid becomes coarse.

Abstract:測量了La0.67-xSmxSr0.33MnO3（x=0.40,0.50,0.60）體系的M-T曲線，p-T曲線和MR-T曲線。實驗結(jié)果表明：x=0．40時，樣品為長程鐵磁有序；x=0．50時，樣品為自旋團簇玻璃態(tài)；x=0．60時，樣品在低溫時表現(xiàn)為反鐵磁狀態(tài)。高摻雜（壚0．60）樣品的輸運行為發(fā)生異常，在瓦附近發(fā)生絕緣體．金屬相變后，又發(fā)生金屬．絕緣體相變的現(xiàn)象，這在ABO3結(jié)構(gòu)中很少出現(xiàn)。體系的磁電行為變化取決于摻雜引起的額外磁性和晶格畸變效應(yīng)。

Abstract:Positron lifetime spectra of Ti50Al50, Ti50Al48V2, Ti50Al48Ag2 alloys and annealed Ti, Al, Ag, V metals were measured. The electron densities in the bulk and defects of the alloys were calculated by positron lifetime parameters. The poor ductility of binary TiAI alloy is related to low free electron densities in the bulk and the grain boundaries of the alloy. When V are added into Ti-rich TiAI alloy, V atoms will provide more free electrons than both Al and Ti atoms to participate in metallic bonds, thus increasing the electron densities in the bulk and the grain boundary simultaneously. Ag additions appear to have an effect similar to V additions. Both V and Ag are benefit elements in enhancing the ductility of TiAl alloys.

Abstract:Investigations on the ordering and atom clustering in aged binary Al-Li alloy have been carried out by computer simulation.The long range order parameter(lro.)and composition deviation order parameter were calculated from single-site occupation probabilities of Li atom.The results show that as the composition of the alloy increases from metastable region to instable region in the phase diagram ordering occurs faster than atom clustering gradually and the incubation period of the phase transformation is shortened.

Abstract:研究了在模擬燃燒氣氛中的高溫氧化對Ti-48Al-2Cr-2Nb（at％）合金的高溫拉伸性能的影響以及拉伸變形時氧化層及其影響層的變形特征。研究發(fā)現(xiàn)：在1173K模擬燃燒氣氛中的高溫氧化顯著降低了該合金在1073K的總延伸率（J），屈服強度（σ0.2）和最大拉伸強度（UTS）。高溫拉伸性能的降低與氧化層及其影響層的生長速率和結(jié)構(gòu)關(guān)系密切。高溫拉伸時，該合金氧化層及其影響層的破壞主要集中在3．5％到7．1％的應(yīng)變范圍內(nèi)，其破壞形式主要表現(xiàn)為垂直于載荷方向的裂紋、斷裂和剝離。分析認為，在1173K模擬燃燒氣氛中的高溫氧化對Ti-48Al-2Cr-2Nb合金的高溫拉伸性能的影響途徑主要有如下3個方面：①氧化層及其影響層的形成引起了鄰近基體合金的成分發(fā)生改變；②氧化層及其影響層的早期破壞增加了它們與基體界面上的缺陷并促進了裂紋的萌生。③長時間的高溫氧化引起了Ti-48Al-2Cr-2Nb合金內(nèi)部顯微組織發(fā)生改變。

Abstract:利用光學(xué)顯微鏡（OM）和X射線衍射（XRD）分析了分別加入合金化元素Ce，Si和Ca后AZ91D合金的鑄態(tài)組織和相組成，測試了合金室溫拉伸性能和硬度。結(jié)果表明：加入Ce和Si后合金組織中分別生成桿狀A(yù)l4Ce和漢字狀Mg2Si相，而加入Ca后無新相生成，加入的Ca主要固溶于β相中；Al4Ce和Mg2Si相在合金凝固過程中被推移到生長界面，Ca原子偏聚在生長界面前沿，從而阻礙枝晶的自由生長，細化合金鑄態(tài)組織：Ce和Ca的加入可提高合金室溫綜合力學(xué)性能，且前者提高程度要高于后者提高程度，而Si的加入?yún)s降低合金室溫綜合力學(xué)性能。

Abstract:研究了Ni33Al28Cr5.5Mo0.5Hf合金在900℃10T強磁場處理后的微觀組織及室溫力學(xué)性能，發(fā)現(xiàn)合金經(jīng)強磁場處理后室溫抗彎強度提高約75％，抗拉強度提高1倍多。強磁場處理使合金中Hf元素在NiAl/Cr（mo）相界處析出的塊狀Heusler相部分溶解，彌散分布在Cr（Mo）相界處的小顆粒幾乎全部固溶至NiAl相基體。Heusler相在晶界處析出可能是導(dǎo)致合金室溫強度低、韌性差的主要原因，強磁場處理改善了這一情形，使合金固溶強化加強，提高其力學(xué)性能。

Abstract:利用熱機械模擬系統(tǒng)，對鑄態(tài)Ti-50．3at％Ni合金進行高溫形變循環(huán)熱處理，研究不同熱處理工藝對其組織細化的影響。結(jié)果表明：經(jīng)過高溫形變循環(huán)熱處理，可以獲得晶粒尺度在10μm以下的均勻單相顯微組織。試樣分別在55012和60012進行塑性變形，然后繼續(xù)加熱到80012短時保溫進行不同的循環(huán)熱處理，發(fā)現(xiàn)在55012變形后晶粒細化效果更加明顯。還探討了鑄態(tài)Ti-50．3at％Ni合金高溫形變循環(huán)熱處理中組織的細化機理及其影響因素。

Abstract:研究了溫度、等靜壓力對PbLa（Zr，Sn，Ti）O3陶瓷相變、介電常數(shù)（εr）及損耗（tanδ）的影響。結(jié)果表明：在溫度場下，隨著溫度的升高，PbLa（Zr,Sn，Ti）O3陶瓷從四方反鐵電相（AFET）轉(zhuǎn)變?yōu)榱⒎巾橂娤啵≒Ec），在低溫段出現(xiàn)頻率彌散現(xiàn)象；在壓力場下，隨著等靜壓力的增加極化過的AFE陶瓷發(fā)生FE／AFE相變，同時伴隨突然的釋放電荷過程；在一定的等靜壓力下，經(jīng)極化后變?yōu)殍F電體的PbLa（Zr,Sn，Ti）O3陶瓷在溫度的誘導(dǎo)下會轉(zhuǎn)變?yōu)榉磋F電相，最后轉(zhuǎn)變?yōu)轫橂娤啵浑S著等靜壓力的增加，鐵電／反鐵電轉(zhuǎn)變溫度降低，反鐵電／順電轉(zhuǎn)變溫度上升。

Abstract:考察了幾種不同摻鍶量的理想化學(xué)配比鍶磷灰石粉末在不同溫度熱處理后的相結(jié)構(gòu)與化學(xué)成分,并觀察其晶粒微觀形貌與尺寸的變化。高溫下HAP存在著分解和合并長大之間的競爭。隨加熱溫度升高至1300℃,純HAP基本不分解,但晶粒明顯由600℃下20nm~40nm長大到1300℃下的~20μm;而Sr2+取代Ca2+固溶入磷灰石晶格后,因Sr2+半徑較大且對磷灰石晶體生長有抑制作用,使摻鍶磷灰石分解過程比合并長大過程更為有利,因此,摻鍶磷灰石晶體900℃便開始部分分解生成磷酸三鈣;隨溫度逐漸升高,摻鍶磷灰石晶體分解加劇,同時晶體有所長大但幅度不如純HAP明顯,1300℃下仍維持類等軸形狀(440nm~730nm×220nm~370nm);增大鍶固溶量則加劇分解程度。

Abstract:By using MTS(Mechanical Threshold Stress)model and the experimental technique of the split Hopkinson bar with the synchronization assemblage,the dynamic constitutive equation of the unidirectional-solidified horizontal-continuous-casting polycrystal copper was investigated.In the narrow heated furnace designed and manufactured by NPU,the dynamic impact experiments at tempera-ture from 287 K to 1100 K were accomplished.The optimized parameters of the dynamic constitutive equation applying to the unidirectional-solidified horizontal-continuous-casting polycrystal copper were obtained and the theoretical stress-strain curves had a good agreement with experimental curves at temperature from 685 K to 1085 K.The concept of restoration threshold energy was proposed and the parameters of MTS model were also discussed in detail.The results show that only seven parameters in parameters of MTS model are independent and MTS model is not very good to describe the discreteness of mechanical properties,restoration,recrystallization and associated strain softening at temperature from 287 K to 685 K.

Abstract:采用Sol-gel法合成了系列納米材料La0.68Pb0.32Fe1-xMnxO3（x=0．0，0．1，0．2，0．4，0．6），研究了Mn摻雜對材料的導(dǎo)電特性和氣敏特性的影響。研究表明：合成的系列納米材料均具有正交鈣鈦礦結(jié)構(gòu)，Mn的摻雜對材料La0.68Pb0.32FeO3的結(jié)構(gòu)沒有影響，且對材料粒徑的影響較??；隨Mn元素含量的增加，La0.68Pb0.32Fe-xMnxO3納米粉體對丙酮的氣敏性均迅速降低；Mn摻雜同時導(dǎo)致電阻率減小，這是由于形成Mn^3＋-O^2--Mn^4＋雙交換作用鍵的緣故。

Abstract:A wear resistant Cr-Cu-Si metal silicide alloy having a microstructure consisting of the primary dual-phase dendrite with a Cr5Si3 core encapsulated by CrSi phase and the interdendritic ductile Cu-based solid solution was fabricated by the laser melting process. Microstructure of the Cr-Cu-Si metal silicide alloy was characterized by OM, SEM, XRD and EDS. Microhardness was measured using a MH-6 semi-automatic Vickers micro-hardness tester. Because the wear-resistant metal silicide CrsSi3 and CrSi have high hardness, strong covalent-dominated atomic bonds, and the ductile Cu-based solid solution has excellent thermal conductivity, low coefficient of friction and excellent ductility, the Cr-Cu-Si metal silicide alloy has excellent wear resistance under room temperature dry sliding wear test conditions.

Abstract:系統(tǒng)研究了Ti100-x-yVxFey（x=54，49，44；y=5，7．5，10）儲氫合金的相結(jié)構(gòu)及其吸放氫性能。XRD及SEM分析表明，Ti41V54Fes合金由體心立方（BCC）結(jié)構(gòu)的固溶體主相和少量的α-Ti第二相組成；而Ti43．5V49Fe7．5和Ti46V44Fe10合金均為單一的BCC固溶體相。儲氫性能測試表明，3種合金的動力學(xué)性能均很好，在室溫和4MPa初始氫壓條件下，無需氫化孕育期就能快速吸氫：經(jīng)4次～5次吸放氫循環(huán)即能活化，僅2min～3min就能吸氫飽和達到最大吸氫量363．7ml／g-372．4ml／g；在300℃和0．1MPa放氫終壓條件下，合金的放氫量在220．3ml／g-238．5ml／g之間。在所研究的合金中，Ti46V44Fe10合金的綜合性能最佳，經(jīng)4次吸放氫循環(huán)即活化，室溫最大吸氫量可達372．4ml／g，放氫量達到238．5ml／g。

Abstract:采用提拉法生長出了摻釹鎢酸鉍鈉（分子式Nd：NaBi（WO4）2，簡稱Nd：NBW）和摻釹鎢酸釔鈉（分子式Nd：NaY（WO4）2，簡稱Nd：NYW）晶體。通過TG-DTA分析得到Nd：NBW的熔點為936．2℃，Nd：NYW的熔點為1209．07℃。由吸收光譜可以看出，Nd：NBW在802nm有較強的吸收峰，Nd：NYW在804nm，752nm，586nm附近有較強、較寬的吸收峰，二者均適合于LD泵浦；并計算了晶體中Nd^＋3＋的吸收截面積。通過比較Nd：NBW和Nd：NYW的紅外光譜和拉曼光譜結(jié)果，認為二者結(jié)構(gòu)基本相同，為四方晶系、白鎢礦結(jié)構(gòu)、141/a空間群。

Abstract:The microstructures of the rare-earth-based Low-Co AB5-type LaxMm1-x(NiMnSiAlFe)4.7Co0.2(x=0,1)alloys for hydrogen storage were determined by XRD and SEM,and the electrochemical performances of the as-cast and quenched alloys were measured synthetically.The effects of the substitution La for Mm on microstructures and electrochemical characteristics of the as-cast and quenched alloys were studied.The obtained results show that the substitution La for Mm extends the cycle life of the as-cast alloy and improves the discharge capacity of the alloys because the substitution La for Mm makes the secondary phase disappear and the cell volume enlarge.Rapid quenching can improve the cycle stability of the alloys,but it isn't notable to the as-quenched La1 alloy.It is mainly attributed to the larger grain produced by substitution La for Mm.

Abstract:Mo/Si thin films have been successful deposited on several substrates by using RF magnetron sputtering method and influence of these substrates on the phase structures,surface morphologies and electrical properties of the Mo/Si films have also been investigated.Results obtained from the analyses of X-ray diffraction(XRD),atomic force microscope(AFM)and scanning electrical microscopy(SEM)show that the films deposited on Si and quartz glass substrate are amorphous,but those deposited on Al2O3 substrate are polycrystalline.Four-probe resistance meter was used to characterize their sheet resistance and the results reveal that annealing temperature affects their sheet resistance significantly.As the increase of annealing temperature,the sheet resistance of the films deposited on Si and Al2O3 substrate decreases while the one of the films deposited on quartz glass substrate increases abnormally.

Abstract:A least square method for separating two broadening effects caused by crystallite and micro-stress has been proposed and was applied to study the micro-structure of hydrogen storage alloys prepared by different methods. Changes of microstructure after activation and lifetime testing in Ni-MH battery have been comparatively investigated. The results show that the effect of activation on microstructure of the negative electrode material is significant. It is also found that the microstructure changes of the material are dependent on the lifetime testing conditions.

Abstract:Si3N4 Ceramics were bonded by brazing with bonding materials composed of Ag-Cu-Ti foils and Ti/Ni/Ti multi-interlayer,which enhance the joint strength by in situ reaction occurred while brazing.Ni-Ti-Cu intermetallic compounds were observed in the joints by X-ray analysis.The intermetallic particles are homogeneously distributed in the matrix so they contribute to the joint strength.The distribution of intermetallic compounds and the status of interfacial reaction layer have obvious effect on the joint strength.The interfacial reaction layer has a two-layer structure,and the formation of which has three steps.

Abstract:X-ray absorption fine structures(XAFS)and X-ray excited optical luminescence(XEOL)at the Si K and Si L3,2 edge have been used to investigate the optoelectronic properties of Silicon nanowires.Although no noticeable blueshift of edge jump was observed in XAFS,a less steep rise and the blurring of spectral features was observed,indicating considerable degradation in the long-range order and small size effects.XAFS probes the average of a distribution of wires of various sizes of which the majority is too large to exhibit detectable quantum confinement behavior.The results of XEOL indicates that the luminescence of Si nanowires originate from the encapsulating silicon oxide,the quantum-confined silicon crystallites embedded in the oxide layer,and the interface states between silicon and silicon oxide.

Abstract:The influence of deformation temperature and strain rate on microstructure of Co4NiCrMo Alloy has been analyzed by isothermal compression test and metallurgical analysis.The results show that the grain size increases with the increase of deformation temperature and the grain size decreases with the increase from 0.001s^-1 to 1s^-1 of strain rate,but increases slightly with the increase from 1s^-1 to 10s^-1 of strain rate.The recrystallization volume fraction increases with the increases of strain and the grain size decreases with the increase of strain.

Abstract:Palladium/ferrum(Pd/Fe)film was deposited on the surface of 316L stainless steel by vacuum arc deposition technique followed by vacuum heat treatment.Effects of vacuum heat treatments on the morphology and phase constitution of Pd/Fe films were investigated.The results show that Even Pd/Fe film can be deposited on the surface of 316L stainless steel by vacuum arc deposition,and the diffuse heat treatment techniques have significant effects on the morphology and phase constitution of Pd/Fe film.Certain Pd-Fe alloy phase was formed through interdiffusion between Pd film and Fe film after treatment by 900 degrees centigrade for one hour.Along with the temperature increment of the diffuse heat treatment,the diffusion distance of Pd and Fe film into the 316L matrix increase,where as amount of chromium and nickel of the matrix diffused outwards to the films also increase.

Abstract:Sb摻雜SnO2(Antimonydopedtinoxide,簡稱ATO)納米導(dǎo)電粉末具有優(yōu)良的電學(xué)性能,少量的Sb摻雜即可達到抗靜電要求,而且不改變基體的性質(zhì)。采用非均相成核法制備了ATO納米導(dǎo)電粉末,研究了晶種濃度、反應(yīng)溫度、分散劑對粉末粒徑、電阻率等性能的影響;并對其進行了晶粒粒徑、物相、微觀結(jié)構(gòu)、DTA-TG、表觀形貌和能譜分析。結(jié)果表明,粉末晶粒粒徑為6nm;摻雜Sb沒有在SnO2中形成新相;電阻率為0.23?·cm;ATO干凝膠的煅燒過程經(jīng)歷了4個過程;ATO顆粒呈不規(guī)則的橢圓狀,且分散良好;Sb摻雜均勻性一般。

Abstract:Effects of preparation technology on structure and thermoelectric properties of NixCo4-xSb12(x=0.1~0.5)were investigated separately by solid reaction-spark plasma sintering(SR-SPS)and mechanical milling-spark plasma sintering(MG-SPS)method.The two methods had little effect on phase structure and Seebeck coefficient,but SR-SPS technology augments electrical resistivity and the grain size of products when the content of Ni was as low as 0.1,and hence increase the thermal conductivity and decrease the thermoelectric properties.Compared with SR-SPS,MG-SPS method not only is simple and convenient in preparation,but also is propitious to the improvement the thermoelectric properties.In our experimental range,the Ni0.2Co3.8Sb12 bulk sintered by MG-SPS shows maximum ZT value of 0.6 at about 773 K.

Abstract:采用化學(xué)共沉淀法,以InCl3?5H2O和SnCl4?5H2O為原料,在摻雜濃度In2O3與SnO2的質(zhì)量比為9:1的條件下,合成了平均粒徑80nm的ITO粉體。利用TEM,XRD,DSC-TG,IR,ζ電位分析儀等實驗方法對粉體的形貌、物相、結(jié)構(gòu)等進行了表征。實驗結(jié)果表明,當(dāng)前驅(qū)體煅燒溫度為600℃時,可以獲得晶化良好的立方In2O3結(jié)構(gòu)的In2O3和SnO2固溶體。根據(jù)ζ電位測定和TEM的觀察結(jié)果,當(dāng)反應(yīng)的最終pH值為9時,粉體的分散性較好。

Abstract:Microstructure, streamline and Microhardness of different size BTI6 locknuts have been analyzed and compared with 08 mm thread made of BT16. The results show that the microstructure of BT16 fastener is lamellar type with very fine grain size, which may be obtained by deformed starting in beta field. Microstructure of fastener is very similar with that of thread in annealing state, which show that the fastener is used in annealing state without solution and aging treatment. Streamline and hardness analyses show that fastener is deformed in cold condition.

Abstract:The hydroxyapatite coatings on an anodized titanium substrate were prepared by electrodeposition technique.Properties of coatings were investigated by scanning electron microscopy(SEM),X-ray diffraction(XRD)respectively.The results show that hydroxyapatite crystal is porous-like flakes at the beginning time of the deposition.The thickness of the coatings increase and its morphology changes from porous-like flakes to petal-like flakes with the increase of voltage,time and concentration of electrolyte.The bonding strength of coatings with the substrate is improved by anodic oxidation.

Abstract:Ga2O3 films were deposited onto Si(111)substrates with radio frequency(r.f.)magnetron sputtering system.They self-assembled into GaN films after reacted with ammonia.The lattice mismatch between substrates and epitaxy layer affects the films' quality.In order to optimize the films,thin SiC films as intermediate layers also deposited onto the substrate with magnetron sputtering.The samples intermediate were compared.The results indicate intermediate layer's positive effect to GaN films.

Abstract:The La-Mg-Ni system(PnNi3-type)electrode alloys La2Mg(Ni0.85Co0.15)9Bx(x = 0,0.1,0.2)were prepared by casting and rapid quenching.The microstructures and electrochemical performances of the as-cast and quenched alloys were determined and measured.The effects of boron content and quenching rate on the microstructures and electrochemical properties of the alloys were investigated in detail.The results show that the as-cast and quenched alloys are composed of the(La,Mg)Ni3 phase(PuNi3-type structure),the LaNi5 phase and the LaNi2 phase.A trace of the Ni2B phase exists in the as-cast alloys containing boron,and after the as-cast alloys are quenched,the Ni2B phase in the alloys nearly disappears.The relative amount of each phase in the alloys depends on the composition of the alloys and the quenching rate.The capacity of the alloys without boron monotonously decreases with the increase of the quenching rate,but for the alloys containing boron,the capacities have a maximum value with the variety of the quenching rate.The cycle lives of the as-quenched alloys increase with the increase of the quenching rate.The activation performances of the as-cast and quenched alloys are excellent.

Abstract:The nano-sized MoO3/PMMA hybrid material was prepared by in-situ polymerization method. XRD patterns show that the hybrid material is amorphous. SEM indicates that the morphology of fracture plane of the hybrid material is different when MoO3 content is varied in the hybrid materials, and the fragility increase with the increase of MoO3 content. EDS reveals that the content of Mo is 1.09%. It is found that the transmissivity, solubility, hardness and fracture strength of the hybrid materials decrease with the increase of MoO3 content.

Abstract:利用原位自生法合成的納米晶粒細化劑,成功的克服了顆粒團聚,有效的抑制了顆粒的沉降。本試驗用其對ZL101合金的細化行為進行了研究。試驗結(jié)果表明:加入量為0.2%(質(zhì)量分數(shù))時,納米晶粒細化劑可有效地細化初晶α-Al,改善共晶硅的形貌及尺寸,細化后鑄態(tài)α-Al枝晶尺寸由44μm減小至23μm;經(jīng)T6處理的細化后試樣其拉伸斷口為韌窩斷口,且韌窩明顯多于未細化試樣;加入細化劑后保溫30min,與未細化合金相比,抗拉強度提高了28MPa,屈服強度提高了22MPa,延伸率增加了2.6%;同時細化后合金的阻尼性能較未細化合金有了大幅提高,0.5Hz時細化后室溫阻尼性能Q-1=13×10-3,較之細化前Q-1提高了5×10-3。

Abstract:采用脈沖和直流電沉積方式，以FeSO4，（NH4）2SO4等混合溶液為電解液，在多孔陽極氧化鋁模板（AAO模板）微孔內(nèi)成功制備出Fe磁性納米線陣列。用X射線衍射儀、掃描電鏡及HP8510B網(wǎng)絡(luò)分析儀對多孔AAO模板以及Fe磁性納米線陣列的微觀形貌、組織結(jié)構(gòu)及微波吸收性能進行了測試。結(jié)果表明，沉積的納米線為立方結(jié)構(gòu)α=Fe，且納米線陣列存在（110）擇優(yōu)取向性。Fe納米線組裝后的鋁基AAO模板吸波材料具有良好的微波吸收效果，在2GHz～18GHz頻段內(nèi)的最大反射率為-4．8dB，大于-1dB的吸收帶寬約為10GHz。

Abstract:Taking Nb and Si elemental powders as raw materials,dense Nb/Nb5Si3 composites were successfully fabricated by a spark plasma sintering(SPS)technology.The microstructural features of the synthesized composites were analyzed by OM,SEM,XRD and EPMA.The formation mechanism of the composites was also investigated by a quenching test.The results show that the prepared composites consist of Nb and Nb5Si3 phases,and Nb particles uniformly distribute in the in-situ synthesized Nb5Si3 matrix.During the SPS process,an interfacial reaction occurs between Nb and Si particles to synthesize Nb5Si3 until reactant silicon has been completely reacted.

Abstract:采用金屬有機物化學(xué)氣相沉積法，在不通入活性氣體的條件下，研究了三乙酰丙酮銥先驅(qū)體揮發(fā)溫度對銥涂層顯微結(jié)構(gòu)的影響。在500℃的金屬鈮和陶瓷石英基片上制備出亮銀白色的多晶相銥涂層。分析表明：鈮和石英基片上沉積的銥涂層均由兩層不同結(jié)構(gòu)的薄膜構(gòu)成，220℃揮發(fā)先驅(qū)體沉積出由納米級顆粒疏松堆積構(gòu)成的涂層，185℃揮發(fā)先驅(qū)體沉積出致密的涂層。銥涂層表面光滑均勻，無明顯缺陷。

Abstract:Anisotropic bonded NdFe12Nx magnets have been prepared by different technical route and the factors which have effects on the orientation degree of the anisotropic bonded magnets have also been analyzed. The results show that a good alignment can be achieved with the combination of solvent processing and being pulse-magnetized in preparing anisotropic bonded NdFe12Nx magnets. As a result anisotropic bonded NdFe12Nx magnets with excellent magnetic properties can be made.

Abstract:The formation principal and its physical meanings of the EBSP(Electron Back-Scattered Diffraction Pattern)have been introduced in the present paper.Some application examples on the determination of crystal orientation,micro-texture,crystallographic orientation relationship,stress distribution,lattice parameters,phase identification and boundary nature study with EBSD have been given.