HMD法制备U-10wt%Mo合金粉末的粒度控制  

Granularity Control of U-10wt%Mo Powder Prepared by HMD Method

作　　者：陈建刚[1] 尹昌耕[1] 孙长龙[1] 庞晓轩[1] 刘云明[1] 孙旭东[1] 杨红艳[1] 李传锋[1] 

机构地区：[1]中国核动力研究设计院核燃料及材料国家级重点实验室,成都610041

出　　处：《核动力工程》2009年第6期11-14,共4页Nuclear Power Engineering

摘　　要：对氢化-破碎-脱氢（HMD）法制备U-10wt％Mo合金粉末的粒度控制工艺进行了研究。U-Mo合金在950℃分别退火4、10、24h，然后经过γ→α相转变热处理、HMD法和α→γ相转变热处理等过程成为粉末。分析结果表明：950℃下U-Mo晶粒长大较慢，可通过调节保温时间使晶粒尺寸控制在40-100μm；γ相分解程度强烈依赖于晶粒尺寸，晶粒尺寸越大，γ相向α相的转变程度越低；粉末粒度大小与原始合金γ相的晶粒度密切相关，原始合金γ相晶粒度越大，粉末粗粉比重越大。The granularity control of U-10wt%Mo alloy powder prepared by hydriding-millingdehydriding （HMD） method is introduced in this paper. U-Mo alloy is annealed for 4 h, 10 h and 24 h at 950 ℃. Then U-Mo alloy powder is prepared through the process of γ→α phase transition, hydriding-milling-dehydriding and α→γ, phase transition. Analysis results indicates that the U-Mo grain grows slowly at 950 ℃, and the grain size could be controlled in the range of 40-100 μm by adjusting time. The γ-phase transition is strongly depended on the grain size, and when grain is big, γ→α phase transition is difficult. The powder size is related tightly with the grain size in the initial γ-phase alloy, and when γ-phase grain is big, the mass percent of coarse powder is high.

关 键 词：U-10wt%Mo合金 氢化-破碎-脱氢(HMD) 粉末粒度 

分 类 号：TG13[一般工业技术—材料科学与工程]