磁场引导水溶还原法制备磁性金属纤维

提出了用磁场引导水溶还原法制备磁性金属纤维的新思想，分析了用这种方法制备磁性金属纤维的机理和动力学过程，给出了实验结果．实验表明，磁场引导水溶还原法适合于制备磁性金属纤维，且纤维的直径在μｍ和亚μｍ数量级．     

烧结温度对高速压制制备弥散强化铜材料导电率的影响

弥散强化铜材料具有高强度和高导电性的特性,孔洞是影响导电率的重要因素.本文采用高速压制成形技术,对Al2 O3质量分数为0.9%的弥散强化铜粉压制成形,研究了压制速度对生坯的影响.当压制速度为9.4 m·s-1时得到密度为8.46 g·cm-3的生坯.研究了烧结温度对烧结所得Al2 O3弥散强化铜试样导电率的影响.当生坯密度相同时,烧结温度越高,所得试样的导电率也越高.断口与金相分析表明：烧结温度为950℃时,烧结不充分,颗粒边界以及孔洞多而明显,孔洞形状不规则;烧结温度为1080℃时,颗粒边界消失,孔洞圆化,韧窝出现,烧结坯的电导率为71.3%IACS.     

用光化学方法去除废水中的有害有机物和金属

研究了一些有机物，如丙酮，酚，染料和茶皂角甙的光催化降解，结果表明：酚的降解与文献报导的情况基本相同，在催化剂TiO2的作用下，紫外光能有效降解纺织厂的印染废水中的染料；金属化合物对光降解反应具有很大影响；还首次试验了用光催化原理消除茶皂甙中有毒溶血素的方法。     

金属铝整体式载体催化剂的油烟净化性能研究

制备了金属铝做基质的整体式催化剂，并对该催化剂进行了油烟净化性能的初步研究．采用淬火、活性测定、XRD等手段考察了用溶胶—凝胶法、水解法和碱处理三种方法制备的Al2O3层的牢固度和制备的催化剂活性．结果表明，水解法制的溶胶牢固度较好，但活性不如溶胶—凝胶法所制溶胶;Na2CO3处理过的载体牢固度差，负载贵金属后有一定活性．另外，加入B2O和CeO2助剂可提高催化剂活性和热稳定性．     

桥式起重机金属结构疲劳计算新方法

本文介绍一种计算桥式起重机金属结构疲劳强度的新方法，探讨了结构应力幅的形成和分布，并以实例说明计算的全过程．     

三元离子缔合物浮选-原子吸收法的研究 金属离子·SCN~-·RB体系

本文研究了一种高灵敏度高选择性连续测定ppb级Au、Ag、Cu、Fe、Bi的新分析方法,在pH0.5—1.5范围内金属离子与KSCN及RB形成三元离子缔合物,用甲苯进行萃取浮选,用DMF溶解并用火焰原子吸收法测定.本文详细研究了其浮选条件、浮选行为及分析特性.富集倍数高达200倍.已用于环境监测和化探样品的测定.     

Formation and mechanical properties of Zr-based bulk metallic glass composites with high oxygen levels

Zr-based bulk metallic glass(BMG) composites with in situ formed Y 2 O 3 particle reinforcements were synthesized by proper additions of Y to ultrahigh-oxygen-containing glass-forming alloy precursors.Microstructures,thermal stabilities,and mechanical properties of the composites were investigated.Glass formation was greatly enhanced by Y additions in the alloys and the resultant particles were homogenously distributed in the glassy matrix,allowing for the fabrication of oxide dispersion strengthened BMG composites.The compressive strength and hardness increased by 10% and 20%,respectively,with the introduction of Y 2 O 3 particles.These results are significant for the design and production of Zr-based BMGs and BMG composites with improved properties using commercial high-oxygen content raw materials under industrial conditions.     

Effect of Ag addition on the thermal stability and glass-forming ability of Zr<Subscript>35</Subscript>Ti<Subscript>30</Subscript>Cu<Subscript>7.5</Subscript>Be<Subscript>27.5</Subscript> bulk metallic glass

The thermal stability and glass forming ability (GFA) of Zr35-xTi30Cu7.5Be27.5Agx (x = 0-10) alloys were studied by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and ultrasonic techniques. We found that the addition of 1 at.% Ag can considerably enhance the GFA as indicated by an increase in the critical glass dimension from 15 mm in the Zr35Ti30Cu7.5Be27.5 alloy to 20 mm in the Zr34Ti30Cu7.5Be27.5Ag1 alloy. However, with the addition of more Ag the supercooled liquid region (△Tx) and y parameter (defined as Tx/(Tg+Tl)) drastically decreased from 155 K and 0.436 to 76 K and 0.363, respectively, resulting in a decrease in the GFA. Additionally, the elastic constant (the ratio of shear modulus to bulk modulus or Poisson’s ratio) was also used as a gauge to evaluate the GFA in Zr35-xTi30Cu7.5Be27.5Agx alloys.     

Zr基非晶合金准静态压缩下的多重剪切带行为

利用IUTM和SEM研究了Zr-Ti-Ni-Cu块状非晶合金的准静态单轴压缩变形和断裂行为. 研究表明:该合金的室温压缩变形过程主要表现为弹性和塑性变形,塑性变形阶段没有加工硬化现象. 在准静态压缩条件下Zr基非晶合金表现出多重剪切效应,提高了塑性. 微观研究证明,剪切带的滑移分枝与相互交叉是非晶合金塑性提高的主要机制. 沿着剪切带发现了微空洞和微裂纹,剪切带的形成与自由体积的合并有关. 塑性变形过程中形成脉纹状断口形貌,受力状态的不同脉状花纹表现为不同的形式.