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Abstract:It is pointed out that the images obtained by high-resolution electron microscopes is not always reflect the crystal structure directly, and the resolution of the structure image taken under a certain defocus condition is limited by the resolution of the electron microscope. The structure image with atomic resolution can be directly obtained only with the high-voltage high-resolution electron microscopes. The advantage of introducing diffraction analysis into high-resolution electron microscopy (HREM) is clarified,and an electron crystallographic image processing technique set up by combining the diffraction crystallography with HREM is introduced in the present paper. This technique makes realizable the ab initio crystal structure determination by HREM. It is shown that the resolution of the structure image obtained with a medium-voltage electron microscope can be enhanced up to the atomic resolution.Examples of applying this technique to the study of crystal structures and defects are given.

Abstract:研究了添加微量Sc，Zr的Al-Mg合金的再結晶行為，結果表明：Al-Mg-Sc-Zr合金的再結晶起始溫度為400℃，細小、彌散基體共格的析出相對位錯和亞昌的釘扎作用是合金再結晶溫度大幅度提高的主要原因，再結晶形核機制為亞聚合機制。

Abstract:The characteristics of the desorption process of the hydrogenation disproportionation product of NdFeB alloy were investigated. Nd Fe B alloy was melted in a vacuum mild frequency induction furnace. The sample was prepared by a hydrogenation disproportionation desorption recombination process. The mechanism of the recombination Nd 2Fe 14 B type hard magnetic material by a desorption of hydrogenation disproportionation product of NdFeB alloy was established by the comparison of the microstructures, X-ray diffraction patterns and magnetic properties.

Abstract:研究了用能量為3．0keV－4．0keV，束流為80mA－200mA的低能氮和氬離子束對Ti膜進行轟擊的作用以及用低能氮離子束對真空電弧沉積Ti－N膜層輔助沉積作用。結果表明：用低能氮離子束對Ti膜進行轟擊可以形成Ti2N相，在（204）晶面出現一定的擇優(yōu)取向，并對Ti膜層有一定的強化作用；在低能氮離子束對真空電弧輔助沉積過程中，膜層表現為較高的顯微硬度；隨低能離子束能量的增大，真空電弧沉積膜層中Ti2N相增多，在（002）晶面出現擇優(yōu)取向，膜層晶粒有粗化的趨勢，但顯微硬度卻增加，這與Hall-Petch公式不符。

Abstract:A model of electrical conductivity of CuW composite and a model of CuW/CrCu solid material were established on the basis of physics in this paper,and the models were proved and corrected by experimental results subsequently.

Abstract:應用新型化學涂層工藝（置換法），成功地制備出結合緊密、光滑的Ni涂SiC粉末；分析對比了2種不同涂層工藝原理及涂層效果；分析了不同SiC增強Al-Fe-V-Si（0812）復合材料物理和力學性能，結果表明：由于涂覆SiC與基體的結合更加牢固，較軟的基體合金與過渡層Ni的結合而降低了增強體與基體合金之間的孔隙率，從而使10％SiC（Ni）/Al-Fe-V-Si（0812）（質量分數，下同）復合材料在室溫的斷裂強度分別比基體和10％SiCp/Al-Fe-V-Si（0812）復合材料增加了62．15％和2．82％，在400℃時分別增加了55．3％，28．6％。

Abstract:Base on the theory of electromagnetic field and magneto hydrodynamic, an apparatus of double-driving by magnetic force media with permanent magnet has been designed and manufactured. The characteristics analyzed from theory and experiment show that the apparatus can drive and stir molten metal without any directly contact; the shape and wave of meniscus can be controlled by the apparatus. When velocity of down driver is 35 turns per second, the upper is 20 turns per second, surface of metal liquid is more straight with little wave. That is like-stabilization state of meniscus; under this condition solidification structure of continuously casting is100% fine equiaxed structure, initial solidification point is descended and the solidification shell become thinner and uniformity.

Abstract:在研究Ti－Al二元相圖及合金元素的影響、TiAl基合金顯微組織類型與連續(xù)冷卻轉變、熱處理實踐及效果的基礎上，提出了快速加熱循環(huán)熱處理新工藝，該工藝的特點是：加熱速度快，單相構保溫，保溫時間短，冷卻速度相對較慢。分析了該工藝的優(yōu)點和缺點。

Abstract:A computer automatic data acquisition and control system which can be used for data acquisition and reduction of temperature field during high rate directional solidification(HRS) process has been developed. The system has been applied to the investigation of DD98 single crystal superalloy solidification process. The result shows that the data are stable and the problem of interference at workshop is resolved, the solidification parameters, such as temperature gradient, width of mushy zone, are variable with the stationary heating temperature and withdrawal rate. The temperature gradient is highest in the starting stage and becomes stable during the late stage of solidification. The width of mush zone is increased in the solidification process.

Abstract:SCS-6 SiC/Ti matrix composite was prepared by a method of matrix coated fiber with magnetron sputtering and hot isostatic pressing. The tensile strength of the composite in as-processed condition was measured and the effects on the property were discussed. It is shown that the chemical concentration of the alloying elements in the coating is nearly the same as that in the target material. It was pointed out that the uniformity of the fiber distribution in the composite, the content of oxygen in the coating and the diffusion and reaction of elements at the fiber/matrix interface are the main factors for the property degradation of the composite.

Abstract:Titanium nitride films were deposited by ion beam assisted deposition, magnetron sputtering and ion-beam assisted magnetron sputtering deposition on GCr15 and Si substrate. The structure and mechanical properties such as micro-hardness, bonding strength, wear resistance were studied as well as the corrosion resistance. The results show that the hardness, bonding strength and wear resistance of the titanium nitride films deposited by ion-beam assisted magnetron sputtering are increased greatly and the corrosion resistance of films is also improved.

Abstract:By studying the bright discharge phenomenon in the sputtering process and the deposition rate of the AlN films, it was found that an instable AlN layer was formed on the target surface with increasing the N 2 concentration. Since the sputtering rate of AlN target was very lower than that of the Al target, the deposition rate of AlN films was decreased rapidly. At the meantime, the effects of other experimental parameters on the deposition rate have been studied. The results shown that the deposition rate decreased with increasing the distance ( D ) from target to substrate and decreasing target power, whereas the deposition rate reached a extremum with increasing sputtering pressure from 03 Pa to 12 Pa.

Abstract:采用直流濺射多層結合退火技術，制備了不同富鐵量的各向同性Fe－Pt納米晶永磁薄膜。對這些永磁薄膜的研究表明：在500℃退火3min－10min得到的所有不同富Fe量的Fe－Pt永磁薄膜是各向同性的；它們的磁滯回線都顯現單相的硬磁行為；所有的薄膜顯示出剩磁增強效應，其剩磁隨富Fe含量的增加而增大。磁力顯微鏡觀測表明，在熱退磁狀態(tài)下Fe－Pt薄膜顯現出不規(guī)則的?？鐢祩€晶鑿的島狀疇，其大小是平均晶粒尺寸的7倍－10倍。

Abstract:In this paper, the microstructure and the electrochemical properties of RE(NiCoMnAl) 5 hydride alloy with different composition of rare earth have been investigated. The results show that, for all the samples studied, the crystalline structure is CaCu 5 type hexagonal structure and the metallographic structure is dendrite, while, the unit-cell volume decreases after being substituted part La by other rare earth elements. The effect of the composition of rare earth on the electrochemical properties of RE(NiCoMnAl) 5 alloy is marked. As compared with La(NiCoMnAl) 5 alloy, the electrochemical capacity of RE(NiCoMnAl) 5 alloy decreases, the high-rate dischargeability improves and the cycling life enhances, where La is part substituted by others rare earth including Ce, Pr, Nd. The effect of the composition of rare earth on the electrochemical properties is related to the change of the microstructure of RE(NiCoMnAl) 5 alloy.

Abstract:以Ce為主研究了元素對起燃溫度的影響并與國外研究較多的鈣元素的作用進行了對比，認為Ce與Ca同樣對鎂合金的阻燃具有顯著作用，添加1％的Ce，起燃溫度提高約180℃，而添加1％的Ca，起燃溫度提高約280℃?？芍苯颖┞对诖髿庵腥蹮掓V合金。研究表明：添加稀土Ce的鎂合金的表面膜基休幣原來的MgO疏松結構轉變?yōu)橛蒑gO，Ce2O3，Al2O3及Mg17Al2組成的復合致密結構，具有很好的阻燃效果。

Abstract:A kind of binder technology for extrusion molding of hardmetal powder has been developed. By optimizing the binder formulation design and its fabrication method and technical conditions, the novel binders, with excellent properties and uniform distribution, were manufactured. The thermal debinding processes and its mechanism of binder and feedstock have been studied. It is found that the thermal debinding can be divided into two stages, egthe low temperature stage and the high temperature stage. And their thermal debinding mechanism is the mechanism of thermal diffusion, but the thermal debinding activation energies are different in the two stages. The results show that adding of other components acted as a catalyzeing in either binder or feedstock, and can decrease effectively the activation energy of thermal debinding processes.

Abstract:CeO 2 nanoparticles hydrosol was synthesized by colloidal chemical method. The optimum experiment conditions for the preparation of CeO 2 nanoparticles hydrosol were discussed. The effects of pH values, the reactant concentration and temperature on peptization process were studied. TEM photos showed that the CeO 2 nanoparticles were spherical in shape and the size was about 3nm. Particle size distribution was in narrow range, and no agglomerates were observed. ED images indicated that the CeO 2 nanoparticles were polycrystalline structure, and some of CeO 2 were monocrystal particles.

Abstract:采用正交實驗設計的方法 ,系統(tǒng)的研究了注射壓力、注射溫度、注射速度、模具溫度及其交互作用對注射成形生坯質量的影響 ,通過直觀分析和方差分析 ,評價了各參數影響生坯質量的顯著程度 ,優(yōu)化了注射成形參數。結果表明 :注射溫度、注射壓力及注射溫度與模具溫度的交互作用對生坯強度影響顯著 ,注射溫度和注射壓力對生坯密度影響顯著 ;注射壓力增加 ,生坯密度和抗彎強度都增高 ;注射溫度增高 ,生坯密度降低 ,注射溫度在 165℃～ 170℃之間時 ,成形坯抗彎強度變化不大 ,175℃時明顯下降 ;模具溫度和注射速度分別為 3 0℃和 60 %時 ,生坯密度、抗彎強度達到最高值 ;尺寸為 6mm× 6mm× 42mm矩形生坯的最佳注射參數為 :注射壓力 14 4MPa ;注射溫度165℃ ;注射速度 60 % ;模具溫度 3 0℃。

Abstract:The paper introduced the use of the simplex optimization method to search the best for parameters for measurement of Fe, Cu, K, Mg, Zn, Mn, As, Pb, Sb and Bi in biololgical samples by using a atomic absorption spectrophotometer. The method has the advantages of quickness and accuracy. The results were satisfied.