摘要
利用热天平连续称重，研究了Ｎｉ３Ａｌ－Ｍｏ基合金（ＩＣ－６）在１２７３，１３７３Ｋ的空气中恒温３００ｈ的氧化行为．用ＥＰＭＡ及ＸＲＤ分析了氧化层的结构和成分，；ＩＣ－６合金的氧化层中包括ＮｉＡｌ２Ｏ４，ＮｉＭｏＯ４，ＭｏＯ２相．氧向内扩散及ＭｏＯ２氧化形成挥发性ＭｏＯ３同时影响着ＩＣ－６合金的氧化进程，氧化反应方程式可表示为：理论方程与实验数据吻合较好．ＭｏＯ３在１２７３、１３７３Ｋ的挥发速率常数分别为３．２７×１０－５和２．５５×１０－４ｍｇ／ｃｍ２·ｓ．
A study of oxidation kinetics of DS Ni3Al-Mo base alloy(IC-6) have been carried out in thermobalance at 1273 and 1373 K in air for 300 h.The structure and composition of the oxide were examined by EPMA and XPD analyses.The oxide oxidation of IC-6 alloy can be described as a system in which both oxygen inward diffusion of oxidation of IC-6alloy:is in good agreement with experimental data.The volatilization rate constant of MoO3 was calculated qualitatively,as Ks=3.27×10-4mg/cm2·s at 1273 and 1373K respectively.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1994年第1期A044-A048,共5页
Acta Metallurgica Sinica
基金
国家863计划资助
关键词
IC-6合金
高温氧化
机理
DS Ni_3Al-Mo alloy,high temperature oxidation,parabolic rate constant,volatilization rate coustant
