采用化学包裹法制备MoSi2/Cu复合粉体

来源期刊:中国有色金属学报2009年第4期

论文作者:陈辉 郭铁明 马勤 邹欣伟

文章页码:733 - 737

关键词:化学包裹;MoSi2/Cu;热稳定性;复合粉体

Key words:chemical coating; MoSi2/Cu; thermal stability; composite powder

摘    要:采用化学包裹法制备MoSi2/Cu复合粉体,研究MoSi2/Cu包裹粉体的物相组成、颗粒形貌及包裹粉体的热稳定性。结果表明:复合粉体的主要物相组成为Cu、MoSi2及自发氧化生成的Cu2O;包裹颗粒呈椭球形的蛋状结构,包裹层厚度为150~400 nm,包裹效果较好;在氢气炉中于950 ℃煅烧1 h后,复合粉体主要物相为Cu和MoSi2,强化相MoSi2未与基体Cu发生反应。DSC分析表明:1 000 ℃以下复合粉体中只有Cu2Cl(OH)3和Cu2O的分解反应,复合粉体具有较好的热稳定性。

Abstract: MoSi2/Cu composite powder was prepared by using chemical coating method. The phase composition, morphology and thermal stability of coating powders were investigated. The results show that the main phases in the as-fabricated sample are Cu, MoSi2 and Cu2O introduced by spontaneous oxidation reaction. The coated particles have the egg structure. The thickness of coated layer is 150-400 nm and the effect of coating is good. The coated powders were calcined in a hydrogen atmosphere furnace at 950 ℃ for 1 h, the main phases after heating are Cu and MoSi2, and there are no reactions between MoSi2 and Cu. The results of DSC analysis show that there are only decomposition reactions of Cu2Cl(OH)3 and Cu2O in the calcined sample below 1 000 ℃. MoSi2/Cu composite powder has good thermal stability.

基金信息:甘肃省自然科学基金资助项目
兰州理工大学特色研究方向梯队资助项目

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