Ni表面修饰对Mg_2Ni储氢合金电化学性能的影响

采用机械合金化（MA）法制备了Mg2Ni储氢合金并以机械合金化法以Ni对Mg2Ni合金电极进行了表面修饰.主要研究了以不同质量比的Ni对Mg2Ni储氢合金表面修饰后电化学性能的影响.测试结果表明：Ni的修饰不仅可以有效的提高合金的放电容量和循环稳定性,还可显著提高Mg2Ni合金电极的高倍率放电性能.     

提高高铝锌合金高温性能及耐磨性的研究

以高温硬度作高温强度和耐磨性的参考评价指标，试验研究了铝，铜，硅，锰等含量对高铝锌合金高浊硬度的影响，并由此而研究出Ｚｎ－Ａｌ４３，型高铝锌合金的耐磨性优于高强度锌合金ＺＡ２７和挤压加工铝青铜ＱＡｌ１０－３－１．５，故有可能进一步扩大高铝锌合金的应用范围。     

铸态珠光体球墨铸铁组织形态与性能

在普通球墨铸铁的基础上，加入Cu、Sb合金元素，通过余温正火工艺，获得铸态珠光体球墨铸铁。该铸铁的珠光体含量大于（等于）95％，渗碳体小于（等于）5％，抗拉强度可达700-850MPa，硬度为280-350HB，延伸率为3％～5％。扫描电镜及透射电镜分析表明，当加入0．5％Cu、0．02％Sb时，合金主要由珠光体与球状石墨组成，其中铸态珠光体层片间距变小，石墨球细小而均匀，铁素体的形成受到抑制。     

NiAl金属间化合物力学性质的合金化效应

采用第一原理赝势平面波方法计算了NiAl超胞合金化的几何与力学性质结构,应用几个力学参数表征和评判了合金化元素对NiAl金属间化合物延/脆性及其硬度的影响.结果发现:Cr,Mn,Fe,Co和Cu合金化均可提高NiAl金属间化合物的硬度,其增加次序为:Mn>Co>Fe>Cr>Cu,但合金化元素含量过高(6.25at%),却使NiAl金属间化合物的延展性降低,其降低次序与硬度增加的次序相反.     

机械合金化Co80P20合金的交流磁性

由行星式高能球磨机采用机械合金化法成功地将纯元素粉末Ｃｏ和Ｐ合成为非晶态Ｃｏ８０Ｐ２０合金。其结构由Ｘ射线衍射仪分析。讨论了交流磁性能随球磨时间的变化规律。在球磨时间为３０ｈ附近出现完全非晶相时样品的交流磁化率ｘ达极大值；而反映铁磁物质磁损耗性能的损耗因子ｔｇδ出现极小值。     

Development of CuMn35 Master Alloy

This article has investigated the principle and method of smelting CuMn35 master alloy by fusion alloying. And some questions about deoxidation and removal of hydrogen has been discussed. We have found the best process conditions after a series of orthogonal experiments and obtained uniform components by chilling technique. Elsewhere, we use carbon and cryolite as covering agent and refining agent to reduce oxide inclusion greatly and improve the surface texture and the yield of copper and manganese, attained 99.99% and 99.31% respectively. The results of the experiment show that the process is advisable.     

Progress in Studies on Mechanical Alloying

Mechanical Alloying(MA),as one of the high techniques on preparing alloy power,made it possible to alloy some materials which can not be realized with the traditional melting craft in the past.Meanwhile,the quasi-stable state and non-equilibrium state which are far from thermodynamic equilibrium and the synthesis of new materials can be realized.The technique of MA caused extensive concern in the material science field.With MA technique,the research in recent years on theory models and solid-state reactions were summarized.The applying progress of the MA technique in preparing materials such as dispersion strengthened alloy,intermetallics,function material and metastable materials(including non-crystal,pseudo crystal,supersaturated solid solution and nano-crystal) are detailed,and the development trend of the MA technique is prospected.     

Research Status and Development of AZ31 Magnesium Alloy

The characters of AZ31 Magnesium Alloy are reviewed. The effects of main alloying elements on microstructures and properties, mechanical properties, grain refinement and superplasticity of AZ31 magnesium alloy are discussed. Future development directions and application areas are also introduced, noting that new forming technology magnesiumbased composites and the basis theory of AZ31 Magnesium Alloy should be future research emphases.