超重力燃烧熔渗钨铜合金绝热温度计算及其显微组织  

Adiabatic temperature calculation and microstructure of W-Cu alloy fabricated by combustion synthesis infiltration technique under ultra-gravity field

作　　者：孙祥鸣[1,2] 宋月鹏[1,2] 高东升 李江涛[3] 陈义祥[3] 郭世斌[3] 

机构地区：[1]山东农业大学机械与电子工程学院,山东泰安271018 [2]山东省园艺机械与装备重点实验室,山东泰安271018 [3]中国科学院理化技术研究所,北京100190

出　　处：《材料热处理学报》2013年第6期158-162,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51001111);ITPA人才项目(2010GB106003);国家"十二五"科技支撑计划项目(2011BAD12B02);山东省研究生教育创新计划(SDYY11079)

摘　　要：根据燃烧合成体系绝热温度的热力学基本理论,通过计算机编程,对CuO/Al铝热剂体系的绝热温度进行了数值计算。结果表明,在考虑产物Cu的汽化焓情况下,体系绝热温度为2846 K(Cu的沸点温度),同时还有52.9 at%的Cu产物以气相形式存在,而该体系中钨粉添加量超过30 mass%时,绝热温度低于1800 K而不能自蔓延燃烧。采用超重力燃烧熔渗方法制备出组织致密,钨颗粒体积分数呈梯度分布(沿超重力方向70%～80 at%)的钨铜合金。进一步检测结果表明,该方法与传统烧结方法制备的钨铜合金其相结构及显微组织形貌相同,并对其成型机制进行了初步分析讨论。The adiabatic temperature of CuO/AI thermit was calculated through computer programing based on the theory of thermodynamics. With considering to the vaporization entbalpy, the calculated adiabatic temperature reaches 2846 K for the boiling temperature of Cu product with partial gas phase about 52. 9% molar fraction. When adding W powder more than 30% mass fraction in CuO/A1 therrnit, lower than 1800 K of adiabatic temperature is observed, which indicatee that it is impossible of self-propagating reaction. Combined with the infiltration technique, functionally gradient material of W-Cu alloy is prepared by self-propagating high-temperature synthesis under ultra-gravity field. Further examination indicates that the same phase structure and microstructure are obtained for W-Cu alloy fabricated by this approach compared with the W-Cu alloy prepared by traditional sintering methods. The synthesis mechanism is also primarily analyzed and discussed.

关 键 词：钨铜合金 超重力燃烧熔渗 绝热温度 显微组织 计算机数值计算 

分 类 号：TG135.5[一般工业技术—材料科学与工程]