学术
摘 要:
对铜锌粉末在30℃、-20℃以及常温条件下进行了高能球磨。利用透射电镜、X射线衍射仪对粉末的微观形貌、显微结构、晶体结构进行了研究。结果表明：30℃低温可显著降低粉末塑性，不添加过程控制剂时，球磨过程可顺利进行，颗粒表面平整，呈脆性断裂特征；常温与-30℃低温球磨10h产物均为α＋γ相。-20℃低温不添加过程控制剂时，冷焊作用强，球磨不能顺利进行；添加过程控制剂后，球磨过程顺利进行，颗粒尺寸最小，-20℃球磨10h产物为α相、γ相与ZnO，继续球磨，最终形成α相、ZnO及未知相。[著者文摘]
文章出处:
《中国有色金属学报》-2005年15卷10期 -1577-1582页
分 类 号:
文献标识码:
A
文章编号:
1004-0609（2005）10-1577-06
Mechanical alloying of copper-zinc powders at cryogenic conditions
ZUO Ke-sheng, XI Sheng-qi, ZHOU Jing-en, LIU Guo-yuan, ZHU Rui-hua （State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi＇an Jiaotong University, Xi＇an 710049, Shaanxi）
Abstract:
Copper-zinc powders were milled at -30℃ , -20℃ and room temperature for 10 h, respectively. TEM, X-ray diffractometer were used to study the micro-morphology and crystal structure of the powders. Cryomilling at -30℃ without PCA（process control agent） can go smoothly because the plasticity of the powders is apparently reduced. The flat surfaces of the particles indicate the brittle fracture process. But milling under the other two conditions can＇t go smoothly without PCA. XRD patterns show powders prepared at -30℃ and room temperature consist of α phase and γ phase, but powders prepared at - 20℃ consist of a phase, γ phase and ZnO. When milled for 24 h at -20 ℃. powders consist of a phase, ZnO and an unknown phase.[著者文摘]
Key words:
copperzinc alloy; cryogenic ; mechanical alloying（MA） ; high-energy-ball-milling
基金资助:
西安市工业科技攻关资助项目（GG04057）;高等学校博士点基金资助项目（20040698053）;教育部科学研究重点资助项目（105109）
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