学术
摘 要:
将Cu-40%Zn（40％为质量分数）二元系粉末在-30℃和常温下进行高能球磨，并利用X射线衍射仪及扫描电子显微镜对球磨过程中的组织演变过程及微观形貌进行了研究．研究结果表明：Cu-40%Zn二元系粉末的机械合金化过程是一个Cu向Zn中扩散、固溶与反应的过程，最终产物为Cu0.64Zn0.36（α相）与少量的ZnO相；低温球磨合金粉末的晶格畸变量与晶粒尺寸都比常温球磨的大；与常温球磨不同，低温球磨可以抑制冷焊所带来的不良影响，避免添加过程控制剂，而且体系呈现脆性-脆性特征．[著者文摘]
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文章出处:
《西安交通大学学报》-2007年41卷1期 -91-95页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
0253-987X（2007）01-0091-05
Temperature Effect on Mechanical Alloying of Cu-Zn Binary
Zuo Kesheng, Xi Shengqi, Zhou Jinglen （State Key Laboratory for Mechanical Behavior of Materials, Xi＇an Jiaotong University, Xi＇an 710049, China）
Abstract:
Cu-40%Zn powder is milled at -30 ℃ and room temperature respectively with a high energy mill. The phase transformation and microstructure are observed under X-ray diffractometer and scanning electron microscopy. The mechanical alloying of Cu-40 %Zn indicates diffusing of Cu into Zn to finally form Cu0. 64 Zn0.36 and ZnO. The lattice distortion of the alloyed powder in lowemperature milling is stronger than that in room temperature milling. The grain size of the powder milled at low temperature is bigger than that at room temperature. The negative effect of cold welding can be depressed in low-temperature milling without adding process control agent. The Cu-Zn binary system belongs to ductile-ductile system in room temperature milling, but it manifests the characteristic of brittle-brittle system when milled at low temperature.[著者文摘]
Key words:
mechanical alloying; high energy mill; diffusion; Cu-Zn binary powder
基金资助:
教育部高等学校博士学科点专项科研基金资助项目（20040698053）;教育部科学技术研究重点资助项目（105159）;西安市工业科技攻关资助项目（GG04057）.
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