Cu-Al预合金粉末中Al内氧化工艺的分析  

ANALYSIS ON INTERNAL OXIDATION TECHNOLOGY OF Al IN Cu-Al PRE-ALLOYED POWDERS

作　　者：梁淑华[1] 徐磊[2] 方亮[1] 范志康[3] 

机构地区：[1]西安交通大学金属材料强度国家重点实验室,西安710049 [2]中国科学院金属研究所,沈阳110016 [3]西安理工大学材料学院,西安710048

出　　处：《金属学报》2004年第3期309-313,共5页Acta Metallurgica Sinica

基　　金：陕西省教育厅科技基金02JK131

摘　　要：对高能球磨制备的CH-Al预合金粉末中Al内氧化的工艺进行了研究。结果表明,温度是决定临界氧分压Po_2的关键因素,随着温度的升高,临界氧分压增加,适当提高温度可以减小环境氧分压的控制难度,高能球磨制粉对Al内氧化的热力学条件影响不显著,但对动力学条件影响显著,当Al的质量分数大于0.5％时,对于不同的Al含量的Cu-Al预合金粉末应有不同的加热工艺,当工艺参数适宜时,采用CU-Al预合金粉末可以制备出组织均匀的Al_2O_3/Cu复合材料,其中Al_2O_3颗粒粒径2—5μm,颗粒间距5—10μm。The internal oxidation technology of Al in Cu-Al pre-alloyed powders is discussed. The results show that the reacting temperature is a key factor to determine the critical oxygen partial pressure. The maximum oxygen partial pressure increases with increasing temperature, so that a little higher temperature than that of ordinary reaction is helpful to reduce the difficulty of controlling internal oxidation. High energy milling has little influence on the internal oxidation thermodynamics, however, remarkable influence on the internal oxidation kinetics. When the Al content exceeds 0.5%, the heating parameters should be alternated based on Al content. It can be observed from the examinations of the samples that the spherical Al2O3 particles with an average diameter size of 2-5 mum and particles spacing of 5-10 mum are dispersed in the Cu matrix uniformly, when used the suitable processing parameters of internal oxidation.

关 键 词：Cu-Al预合金 内氧化 高能球磨 AL2O3/CU复合材料 

分 类 号：TB331[一般工业技术—材料科学与工程] TF123[冶金工程—粉末冶金]