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Abstract:Low Co AB5-type Mm(NiCoMnAl)5Bx (x=0~0.2) hydrogen storage alloys were prepared by casting and rapidly quenching. The microstructures and electrochemical characteristics of the alloys were analyzed and measured. The effects of boron content and rapidly quenched technique on the lattice constants, thermodynamic parameters, microstructures and electrochemical properties of the alloys were investigated in detail. The obtained results show that the lattice constants, cell volume and standard enthalpy increased with the increase of boron content. When quenching rate is in a specifically range, the rapidly quenched treatment could enhance the discharge capacity of the alloys. When quenching rate is more than a certain critical value, The discharge capacity of the as-quenched alloy is less than that of the as-cast alloys. The cycle life of the alloys monotonously increased with the increase of quenching rate.

Abstract:The paper commented to the following content synthetically: (1) current study of Mn-Znferrite system; (2) magnetic thin film in Fe-Al system; (3) preparation and application of magnetic liquid; (4) improvement of the magnetic property of Fe-Si system; (5) development of magnetic microwave devices.

Abstract:PuNi3型RM3(R=稀土元素，Mg，Ca及第3，4族元素；M=Ni，Co，F(xiàn)e，Cu，Zn等)被認(rèn)為是替代LaNi5基貯氫合金的最重要候選電極材料之一，本文將介紹RM3合金的結(jié)構(gòu)特點(diǎn)、氫化物的結(jié)構(gòu)、氫化行為以及合金電極電化學(xué)性能的研究現(xiàn)狀，并分析了PuNi3型RM3貯氫合金的發(fā)展應(yīng)用仍需解決的問(wèn)題。

Abstract:The basic concept of quantum properties of gold nanowire was presented in this paper. The research background and the present situation is introduced, and the mechanics of conductance by theory is analyzed. The research of the nanocontact of gold wire by STM and MCBJ is also introduced. The conductance of nanocontact of gold wire is quantum, and the quantum properties is under the influence of the electrical field, magnetic field and temperatures, et, al. On the base of experiment results, the unsolved scientific problems are pointed out and the future development direction of this field is predicted.

Abstract:采用熱壓工藝研究了不同工藝制度和原料中不同的Si含量對(duì)Ti3AlC2合成的影響.研究表明在1 300℃～1 500℃,30MPa壓力和Ar氣氛中熱壓摩爾比為n(TiC)n(Ti)n(Al)n(Si)=2110.2的混合粉末,可以得到純度達(dá)98%(質(zhì)量分?jǐn)?shù))以上的致密塊體Ti3AlC2材料;添加的Si均勻分布在基體中,形成固溶體,當(dāng)添加Si的摩爾比為0.2時(shí),固溶體的化學(xué)式為Ti2 76Al0 78Si0.22C2.燒結(jié)試樣的晶體為層片狀結(jié)構(gòu),1 300℃和1 400℃時(shí),燒結(jié)試樣的晶粒尺寸分別為10μm～15μm和20μm～30μm.材料的維氏硬度為3.3 GPa～5.0 GPa,彈性模量為289 GPa,抗壓強(qiáng)度為785 MPa,抗彎強(qiáng)度為375 MPa,斷裂韌性為7.0 MPa·m1/2;25℃時(shí),電導(dǎo)率為3.1×106 S·m-1,熱容為125.4 J/mol·K,熱導(dǎo)率為27.5 W/m·K;熱膨脹系數(shù)為8.8×10-6 K-1.

Abstract:研究了磁流體表觀密度與外磁場(chǎng)間的變化規(guī)律。采用流體靜力稱衡法對(duì)自行研制的煤油基磁流體進(jìn)行測(cè)量，得到了如下結(jié)論：在磁流體中非磁性物體的質(zhì)量與外磁場(chǎng)成反比，表觀密度與外加磁場(chǎng)成正比。

Abstract:提出了電磁無(wú)模成形無(wú)量綱數(shù)的概念，并從電磁無(wú)模成形的基本原理出發(fā)推導(dǎo)建立了該無(wú)量綱數(shù)的數(shù)學(xué)模型，為判斷不同金屬實(shí)現(xiàn)電磁鑄造無(wú)模電磁成形的難易程度以及估算金屬實(shí)現(xiàn)無(wú)模電磁成形所必需的電磁參數(shù)提供了有用的數(shù)學(xué)工具。

Abstract:將NiCrBSi合金粉末預(yù)涂于6061Al合金表面，采用高功率連續(xù)波2kWNd-YAG激光器進(jìn)行激光表面熔覆處理。試驗(yàn)結(jié)果表明，鋁合金對(duì)于波長(zhǎng)1．06gm的激光具有很高的吸收率，選用合適的激光加工工藝參數(shù)和Ar氣保護(hù)，可在鋁合金表面獲得致密的Ni—Al合金激光表面改性層，熔覆層的組織以Ni-Al金屬間化合物為主，改性層的硬度Hv高達(dá)9000MPa以上，且與基體呈現(xiàn)良好的冶金結(jié)合。在3．5％NaCl水溶液中的陽(yáng)極極化曲線測(cè)定及摩擦磨損試驗(yàn)結(jié)果表明，Ni基合金改性層明顯改善了6061Al合金的電化學(xué)腐蝕及摩擦磨損性能。

Abstract:系統(tǒng)研究了TiV1．35Cr1．35-x．Mnx（x=0，0．15，0．25，0.35，0．45)合金的相結(jié)構(gòu)及儲(chǔ)氫性能。XRD分析表明，所有合金均為體心立方(b.c.c．)結(jié)構(gòu)的單一固溶體相，其晶胞常數(shù)隨Mn含量的增加而逐漸減小。儲(chǔ)氫性能測(cè)試表明，用Mn部分取代Cr后，合金的活化性能變差，25℃最大吸氫量有所下降，但合金的吸放氫壓力滯后減小，放氫壓力平臺(tái)變得平坦，100℃有效放氫量和放氫率也隨著Mn含量的增加先升后降，并在x=0.35時(shí)達(dá)到最大值。

Abstract:利用溶膠．凝膠技術(shù)制備了TiO2氧敏薄膜，通過(guò)氧化物摻雜和貴金屬的表面修飾，在空氣氣氛下燒結(jié)氧敏薄膜a結(jié)果表明：600℃～800℃下處理的薄膜是以金紅石為主晶相及少量銳鈦礦的混合晶型，隨著溫度升高銳鈦礦減少，900℃時(shí)銳鈦礦相的峰基本消失：800℃下處理的薄膜靈敏度明顯高于600℃和900℃下處理的薄膜靈敏度。W，Ce氧化物摻雜促進(jìn)TiO2薄膜微量氧化還原，增加催化反應(yīng)活性，使薄膜的氧氣靈敏度有明顯提高：以Pd對(duì)W-TiO2薄膜進(jìn)行表面修飾，使薄膜的阻溫特性得到了明顯提高。

Abstract:研究了低溫燃燒合成前驅(qū)物制備納米級(jí)AlN粉末的低溫?zé)Y(jié)行為,利用XRD,SEM等手段對(duì)陶瓷粉末及燒結(jié)體進(jìn)行了表征。結(jié)果表明:由于該粉末的粒徑小(約為100nm),比表面積大(17.4m2/g),具有很好的燒結(jié)活性,在未使用燒結(jié)助劑時(shí),在常壓下1700℃獲得了致密的陶瓷材料;添加5%Y2O3燒結(jié)助劑后,AlN的燒結(jié)致密化溫度又降低為1600℃,比通常采用的比表面積低于5m2/g的AlN粉末的燒結(jié)致密化溫度降低了200℃。分析了該種粉末促進(jìn)燒結(jié)的機(jī)理,并在1650℃時(shí)制備出熱導(dǎo)率為132.4W·m-1·K-1的AlN陶瓷。

Abstract:研究了添加Zr元素對(duì)快淬(Nd,Pr)10.5Fe81.5-xZrxCo2B6(x=0,0.5,1.0,1.5,2.0,2.5)合金顯微組織結(jié)構(gòu)和磁性能的影響,用AFM觀察了合金條帶自由表面的顯微結(jié)構(gòu).結(jié)果表明添加Zr元素能顯著細(xì)化合金的晶粒,從(Nd,Pr)10 5Fe81 5Co2B6合金的～150 nm減小到(Nd,Pr)10.5Fe80Zr1.5Co2B6合金的～50 nm;1%是Zr最佳添加量,低于1%晶粒不夠細(xì)化,合金的各項(xiàng)磁性能指標(biāo)均很低,超過(guò)1%,富集在晶界處的富Zr晶間相加厚,晶粒間的交換作用和剩磁增強(qiáng)效應(yīng)減弱,磁體的剩磁Br和最大磁能積(BH)m降低.(Nd,Pr)10.5Fe80.5Zr1Co2B6粘結(jié)磁體磁性能最佳Br=0.675 T,Hci=616 kA·m-1,(BH)m=77 kJ·m-3.

Abstract:采用掃描電鏡、透射電鏡、X射線衍射及硬度測(cè)試等手段研究了添加2at％Cu的AlZn對(duì)稱成分合金在冷軋后重新加熱過(guò)程中的組織結(jié)構(gòu)變化。結(jié)果發(fā)現(xiàn)：該合金不連續(xù)析出組織在冷變形后重新加熱時(shí)發(fā)生了再結(jié)晶，以連續(xù)粗化與不連續(xù)粗化2種機(jī)制進(jìn)行，再結(jié)晶溫度約為100℃：而且相組成物由Al相、Zn相和細(xì)小的ε相轉(zhuǎn)變?yōu)锳l相、Zn相和粗大的T'相。AlZn-2Cu合金不連續(xù)析出組織在冷變形后重新加熱時(shí)，硬度的變化是由再結(jié)晶軟化、T’相粗化以及Zn原子的固溶強(qiáng)化共同影響的結(jié)果。

Abstract:通過(guò)對(duì)實(shí)驗(yàn)Al—Zn—Mg—Cu—Zr-Ag合金不同溫度下(90℃～150℃)時(shí)效得到的硬度和導(dǎo)電率數(shù)據(jù)進(jìn)行了神經(jīng)網(wǎng)絡(luò)建模，發(fā)現(xiàn)在目標(biāo)函數(shù)為0．3，隱層節(jié)點(diǎn)數(shù)為5，學(xué)習(xí)率為0．15時(shí)，系統(tǒng)誤差較小。利用所建立的網(wǎng)絡(luò)模型預(yù)測(cè)不同時(shí)效狀態(tài)下材料的硬度和導(dǎo)電率值，發(fā)現(xiàn)預(yù)測(cè)數(shù)據(jù)與實(shí)驗(yàn)數(shù)據(jù)吻合良好(總誤差3．5％)，為鋁合金時(shí)效性能預(yù)測(cè)和控制提供了1條新途徑。

Abstract:Anatase phase TiO2 and WO3-doped TiO2 thin films were prepared on microscope glass slides by self-assembly method. The films were characterized by atomic force microscope (AFM) and UV-VIS spectrophotometer. The photocatalytic activities of the films were tested on the degradation of rhodamine B dye. The results indicate that when the atom ratio of W/Ti is 2at%, the photocatalytic activity of the TiO2 is improved.

Abstract:TiO2 films doped with SnO2 were prepared on quartz substrate by electrostatic self-assembly method in this paper. Atom force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and UV-Vis-NIR spectrophotometer were employed to characterize the microstructure and performance of the samples. Results of the optical absorption spectra and the measurement of photo-catalytic activity show that the photo-absorbency of the samples is greatly increased and the photo-catalytic activity of the films is well improved by SnO2-doping.

Abstract:Ti-Si-N thin films prepared by pulsed-d.c. PCVD on the surface of HSS substrates, which were bolted with one end of deep holes to simulate the condition of complex-shaped inter-surface of various moulds and dies, were investigated. The micrographs show that the surface morphologies of the films become smoother with the increase of the depths of the holes. The thickness and hardness of the films decrease with the increase of the depth of the hole, which may result from the change of the composition of the films, while the adhesion between the films and substrates show an increase.

Abstract:Under constrained condition, severe plastic deformation at high speed can be carried out at extreme low temperature without annealing. Homogeneously Ultrafine-Grained (UFG) 7075 aluminum alloy (e.g. Al-Zn-Mg alloy) with size about 200 nm was fabricated. Evolution of microstructure was studied by transmission electron microcopy (TEM). Different deformations were observed. Factors such as low temperature and dynamic recrystallization contributing to microstructural evolution were discussed.

Abstract:研究了Ga2O3／Al2O3膜反應(yīng)自組裝制備GaN薄膜。首先利用磁控濺射法在硅襯底上制備Ga2O3／Al2O3膜，再將Ga2O3／Al2O3膜在高純氨氣氣氛中氨化反應(yīng)得到GaN薄膜。用傅里葉紅外譜儀(FTIR)，X射線衍射(XRD)和掃描電鏡(SEM)對(duì)試樣進(jìn)行結(jié)構(gòu)、組分和形貌分析。通過(guò)分析薄膜各方面的性質(zhì)，得出了用此方法制備氮化鎵薄膜的Al2O3緩沖層最佳的厚度為15nm左右，最佳氨化條件是在900℃下氨化15min。

Abstract:通過(guò)在3．0．MPa氫氣氣氛下球磨Mg-30％LaNi2(質(zhì)量分?jǐn)?shù))的混合粉末，制得鎂基復(fù)合儲(chǔ)氫材料。X射線衍射分析表明，球磨80h后的物相組成為MgH2，Mg2NiH4和LaH3，表明球磨過(guò)程中發(fā)生固態(tài)反應(yīng)；SEM及EDS分析表明，復(fù)合體系中成分分布均勻：該復(fù)合儲(chǔ)氫材料具有較高的活性和儲(chǔ)氫量，在3．0MPa氫氣壓力和473K～553K之間的條件下，可以在1min之內(nèi)完成飽和吸氫量的80％以上；在553K時(shí)儲(chǔ)氫量達(dá)到5．419％(質(zhì)量分?jǐn)?shù))。

Abstract:以CaHPO4為初始粉料，采用等離子噴涂一水熱合成復(fù)合技術(shù)在Ti-6Al-4V基體上制備了羥基磷灰石(HA)涂層。用SEM，EDX和XRD分析涂層的形貌和組成，用電子拉伸機(jī)測(cè)定涂層的結(jié)合強(qiáng)度。并與等離子噴涂HA涂層做對(duì)比，研究了涂層的微觀結(jié)構(gòu)和結(jié)合強(qiáng)度及其在生理鹽水中浸泡后的變化。結(jié)果表明：噴涂CaHPO4涂層由β-Ca2P2O7和α-Ca3(PO4)2組成，經(jīng)水熱合成，轉(zhuǎn)化為高純度和高結(jié)晶度的HA涂層；在生理鹽水中浸泡1周～4周后，該HA涂層的溶解性和結(jié)合強(qiáng)度退化程度均低于等離子噴涂HA涂層，呈現(xiàn)較高的組織和力學(xué)穩(wěn)定性。

Abstract:The 873 K isothermal section of La-Ni-Cr ternary system phase diagram was investigated by X-ray powder diffraction, differential thermal analysis and electron microscopy techniques. It is composed of 10 single-phase regions, 17 two-phase regions and 8 three-phase regions. At 873 K, the existence of ternary compounds has not observed in the isothermal section. The maximum solid solubility of Ni in Cr is about 3 at%Ni, and that of Cr in Ni, LaNi5, La2Ni7, LaNi3, La2Ni3, LaNi, La7Ni3 is about 35, 20, 15, 8, 9, 9 and 6 at% Cr, respectively. The solid solubility of Cr in the La7Ni16 phase is nearly zero.

Abstract:AgI hydrosol was prepared by the precipitation method and the effect factors on hydrosol were discussed systematically. TEM photos show that the AgI nanoparticles are spherical in shape , the size of which is less than 50nm.The particle size distribution: in a anarrow range, and no agglomerate has been observed. ED images indicate that the AgI nanoparticles are polycrystalline structure, and some are well-grown monocrystalline particles.

Abstract:利用先驅(qū)體NiNb2O6與MnNb2O6摻雜法改性BaTiO3系統(tǒng)。由于2種先驅(qū)體可以有效地起到展寬與移峰效應(yīng),使系統(tǒng)居里峰在室溫附近取得最大值,在1290℃燒結(jié)時(shí)介電常數(shù)達(dá)到5000以上,容量變化率ΔC/C≤±15%;在系統(tǒng)中加入適量助熔劑可以實(shí)現(xiàn)中溫?zé)Y(jié)(1150℃),介電常數(shù)大于3600,容量變化率ΔC/C≤±12%,滿足X7R特性要求,可用于厚膜EMI濾波介質(zhì)瓷料的制備。

Abstract:采用區(qū)域重熔定向凝固技術(shù)制備了Ti-45Al合金定向凝固試樣,研究了不同參數(shù)下的凝固組織。結(jié)果表明,該合金在定向凝固過(guò)程中一次凝固可以以胞晶形式實(shí)現(xiàn)定向生長(zhǎng),胞晶內(nèi)α2/γ片層方向與生長(zhǎng)方向成45°或90°。凝固過(guò)程中穩(wěn)定相β及亞穩(wěn)相α同時(shí)存在,并以胞狀生長(zhǎng),存在競(jìng)爭(zhēng)而引起的交替現(xiàn)象。降速生長(zhǎng)時(shí)定向組織比較理想。淬火實(shí)驗(yàn)表明,在大過(guò)冷度下亞穩(wěn)α相作為領(lǐng)先相析出。

Abstract:Active template process was successfully used to prepare nano nickel powder. The influences of different technology conditions on the properties of the nano nickel particles were investigated. Laser Granularity Instrument, XRD and TEM were used to analyze the properties of the samples respectively. The action mechanism of active template was also discussed. The results show that active template not only has micro-reactor action and steric stabilization function, but also acts as reducer during reaction. The nano nickel powder via active template process take on regular sphericity-chain morphology without obvious agglomeration and has fine particle size(45.7 nm) and narrow distribution(16.0 nm~59.1 nm).

Abstract:采用熱壓法制備出二層鋯鈦酸鉛(PZT)／聚偏氟乙烯(PVDF)與1層Tb0.28Dy0.72Fe2(Terfenol-D)／PVDF疊層結(jié)構(gòu)的三元復(fù)合磁電材料，研究了不同PVDF含量，以及不同層厚比tp／L對(duì)樣品的介電常數(shù)、介電損耗、電阻率、諧振頻率以及磁電轉(zhuǎn)換系數(shù)αE33，αE31的影響規(guī)律，結(jié)果顯示PVDF的含量和層厚比都存在最佳值(最佳值出現(xiàn)在產(chǎn)0．5，tp／L=2／7)，并且在這個(gè)最佳值處，磁電轉(zhuǎn)換系數(shù)達(dá)到最大。

Abstract:以葉片中的一類重要葉片——鈦合金單榫頭葉片為研究對(duì)象，利用自主開發(fā)的并經(jīng)實(shí)驗(yàn)驗(yàn)證的葉片精鍛三維有限元變形．傳熱一微觀組織演變耦合模擬系統(tǒng)對(duì)其精鍛過(guò)程進(jìn)行了模擬，研究了不同工藝參數(shù)下葉身典型截面鍛后微觀組織的分布規(guī)律。結(jié)果表明：隨著變形溫度的升高，晶粒尺寸和β相體積分?jǐn)?shù)增大；隨著變形速度的增大，晶粒尺寸和β相體積分?jǐn)?shù)相應(yīng)增大；隨著模具溫度的升高，晶粒尺寸分布的均勻性提高：而摩擦條件對(duì)晶粒尺寸和β相體積分?jǐn)?shù)的影響不顯著。

Abstract:利用硅烷偶聯(lián)劑KH550對(duì)Sm2Fe17Nx永磁粉末進(jìn)行了表面包覆處理，研究了不同包覆狀態(tài)的磁粉在300℃以下的氧化行為及其磁性能的變化規(guī)律。采用紅外光譜(FT-IR)、俄歇電子能譜(AES)分析了磁粉表面有機(jī)物的成分、結(jié)構(gòu)及其與磁粉的結(jié)合機(jī)制。測(cè)試了不同溫度下磁粉的氧化增重及磁特性參數(shù)。結(jié)果表明，偶聯(lián)劑以化學(xué)鍵的方式吸附在磁粉表面，形成了1層網(wǎng)狀薄膜，有效地阻止了磁粉與環(huán)境中氧的接觸，從而提高了磁粉在高溫下的抗氧化能力。

Abstract:The influence of different contents of RE on microstructure of Mg-5Al-1Si alloys was studied. Also, the extracting phases were identified and the extracting process and its influence on the mechanical property of alloy were investigated. The results show that addition of small amount of RE to Mg-5Al-1Si alloys resulted in refinement of microstructure. The morphology of the Mg2Si phase changed form coarse Chinese script shape to the fine polygonal shape. Owing to the improvement of microstructure, the mechanical properties of Mg-5Al-1Si alloys at both ambient and elevated temperatures were increased . The high temperature creep resistant properties of Mg-5Al-1Si-xRE raises with the increase of RE content and higher than that of AE42.

Abstract:In this paper, plate-like nano-particles of strontium hydrogen phosphate (SrHPO4) with a thickness of 30 nm~80 nm and a width of 140 nm~200 nm were synthesized by chemical wet method. The influence of processing parameters including aging time, temperature, pH and concentration of solution, on composition, size and morphology of nano-particle was investigated by XRD and TEM. Results show that pH of reaction solution places a critical role on the composition of the final products. Both reaction time and temperature affect greatly morphology but little particle size.

Abstract:將電化學(xué)噪音技術(shù)應(yīng)用于AB5型貯氫合金的研究，初步探索了其放電深度與電化學(xué)噪音(EN)信號(hào)之間的關(guān)系。結(jié)果表明，貯氫合金M／Ni3.75Co0.65Mn0.4Al0．2在穩(wěn)定狀態(tài)的電化學(xué)噪音信號(hào)比充放電剛結(jié)束時(shí)要明顯得多，而且在高溫下的電化學(xué)噪音信號(hào)比室溫下明顯得多。雖然不同放電深度的該合金電極EN信號(hào)有明顯的區(qū)別，但其功率密度譜(PSD)曲線均由低頻區(qū)的白噪音和高頻區(qū)的閃爍噪音組成。隨著放電深度的增加，PSD曲線中閃爍噪音的斜率a和噪音功率P的變化規(guī)律正好相反，a先減小后增大，P先增大后減小。

Abstract:研究了銅碲合金的時(shí)效工藝，用掃描電鏡(SEM)和能譜(EDS)分析了析出相的形貌與組成，進(jìn)而研究了時(shí)效工藝對(duì)其電性能及力學(xué)性能的影響。研究表明：時(shí)效過(guò)程中Te以第二相形式析出(Cu2Te)；隨時(shí)效溫度的升高、時(shí)效時(shí)間的延長(zhǎng)，時(shí)效態(tài)的銅碲合金位錯(cuò)密度降低，晶粒長(zhǎng)大，第二相析出充分，因而電阻率單調(diào)下降；但由于時(shí)效析出與再結(jié)晶的交互作用，其抗拉強(qiáng)度出現(xiàn)波動(dòng)，存在1個(gè)峰值；綜合性能以420℃下時(shí)效6h較好。

Abstract:In this work, the microstructure and electrochemical properties of Co-free MlNi4.0Al0.3Si0.1Fe0.6 hydrogen storage electrode alloys prepared by both conventional casting and melt-spinning processes at different solidification rate were studied comparatively. XRD analyses indicated that both as-cast and melt-spun alloys were of the CaCu5-type structure single phase, but the crystallizability and homogeneity of the melt-spun alloys were improved. The optical microscope and EDS analyses showed that the melt-spun alloys had a fine cellular structure and a more homogeneous composition than that of the as-cast alloy which had a coarse dendrite structure with noticeable composition segregation. The electrochemical tests indicated that the melt-spun alloys showed a good activation property and much better cycling stability, but lower discharge capacity and high-rate dischargeability. It is found that the decrease in both exchange current density I0 and the diffusion coefficient D of hydrogen in alloy bulk is the main reason for the degraded HRD of melt-spun alloys. The change of electrochemical properties of the alloy treated by rapid solidification process is related to the microstructure of the alloy.

Abstract:In order to analysis the effect of micro-arc oxidation time on the structure of the porous titania films prepared by a composite oxidation (that is pre-oxidation and micro-arc anodic oxidation), the SEM, EDS, XRD and micro-hardness testing methods were employed to investigate the phase constitutes, element compositions, morphologies and hardness of the modified films. The results show that micro-arc oxidation time is one of the major factors influencing the morphologies, structures, hardness and the ratio of Ca/P of the coatings treated by the two-step anodic oxidation treatment. With the micro-arc anodic oxidation time increasing, the diameter of the pores, roughness of the surface, hardness all increase, and the atomic ratios of Ca/P are changed at the same time. The rutile phase in the coatings become more and anatase become less when the time varied to a long period. So appropriate porous titania coatings can be gained by adjusting the micro-arc anodic oxidation time in the composite oxidation method.

Abstract:The pressure-composition (P-C) behavior of protium and deuterium in sponge Pd particle has been measured over a temperature range from 278 K to 323 K. Based on these data and combined with literature data, the effect of Pd crystal type and particle sizes on the thermodynamic properties in the Pd-H system was compared each other and discussed. The saturation solubility of hydrogen in solid solution region and the plateau pressure increase with decreasing Pd particle sizes at the ambient temperature. The effect of Pd morphology on above two parameters gets weaker at higher temperature and the difference of plateau pressure among several different Pd morphologies disappears. The absolute value of phase transformation enthalpy and entropy from solid solution to hydride decrease with decreasing particle sizes of Pd, but which are the smallest in single crystal Pd. The degree of hysteresis effect in Pd-H system depends on the background density in the sample, so it is the strongest in sponge Pd particle.

Abstract:CuCr25 alloy is prepared by vacuum induction melting and is rolled at low strain rate. The experimental results show that the electrical conductivity first increases, then it decreases gradually with the deformation. After deforming to certain degree, the conductivity increases again and Cr phases are deformed to ribbons or fibrous. The work hardening of the copper matrix leads to the hardness increase of the CuCr25 alloy. CuCr25 alloy has a superplasticity at room temperature.

Abstract:Microstructural evolution of the semisolid Al-4Cu-Mg alloy fabricated by strain induced melting activation (SIMA) at different deformation temperatures and strain rates during semisolid deforming were investigated. The experimental results show that the grain size increases with the increase of deformation temperature and decreases with the increase of height reduction. Fractal dimension decreases with the increase of deformation temperature and increases with the increase of height reduction after an early drop. Grain size decreases with the increase from 0.001 s-1 to 0.1 s-1 of strain rate, but increases slightly with the increase from 0.1 s-1 to 1 s-1 of strain rate. The lower the strain rate, the greater effect of strain rate on grain size. Fractal dimension increases with the increase of strain rate.

Abstract:MoO3 organosol was obtained by using surface active agent CTAB to modify the nanoparticles in MoO3 hydrosol and n-pentanol to extract MoO3 nanoparticles modified by CTAB. The effect factors on organosol were discussed systematically. TEM photos showed that the MoO3 nanoparticles were spherical in shape, the size was about 40 nm, particle size distribution was in narrow range. ED images indicated that the MoO3 nanoparticles were polycrystalline structure. UV-VIS analysis showed that the MoO3 nanoparticles organosol had good photochromic effect.