NiAl、Ni_3 Al的无压燃烧合成  

PRESSURELESS COMBUSTION SYNTHESIS OF NiAl and Ni_3Al

作　　者：王为民[1] 袁润章[1] 李强[1] 

机构地区：[1]武汉工业大学,武汉430070

出　　处：《粉末冶金技术》1992年第3期182-188,共7页Powder Metallurgy Technology

摘　　要：研究了合成方式和料坯的初始特征对NiAl、Ni_3Al无压自反应燃烧合成的影响。结果表明,采用自反应热爆工艺可以顺利地合成NiAlNi_3Al,但当原料粒度大于100μm时,Ni_3Al合成转化率不高。同时,稀释剂渗加量大于30wt％时,也不能得到纯净的Ni_3Al产品。坯料的初始特征对NiAl合成结果影响不大。但合成温度T_c随粒度增大及稀释剂渗量增加而下降。The influences of synthetic mode and characters of initial compacts (density, particle size and diluent amount) on the combustion synthesis of NiAl and Ni_3Al have been investigated. The results have shown, that NiAl and Ni_3Al intermetallic compounds can be synthesized smoothly by self-reaction heat explosion process. However, Ni_3Al was synthesized with low conversion rate in case of the particle size over 100μm and without pure Ni_3Al products in case of a diluent amount 30wt％.The characters of initial compacts hardly influences the synthesis of NiAl. The synthetic ignition temperature T_(ig) remaines constant regardless of processing parameters. The synthesis temperature T_c decreases with the increase of particle size and diluent amount.

关 键 词：无压燃烧 合成 金属互化物 

分 类 号：TF125.2[冶金工程—粉末冶金]