High-temperature gas nitridation of TiAl based alloys

被引：0

作者：

Zhao, B ^{[1
]}

Wu, JS ^{[1
]}

Sun, J ^{[1
]}

Wang, F ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Key Lab Minist Educ High Temp Mat & Tests, Shanghai 200030, Peoples R China

来源：

ACTA METALLURGICA SINICA | 2001年 / 37卷 / 08期

关键词：

TiAl; high-temperature nitridation; wear resistance;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The nitridation process of TiAl based alloys in an atmosphere of purified ammonia has been investigated. The nitridation temperature range is between 800 degreesC and 940 degreesC and the major emphasis is at 940 degreesC. X-ray diffraction and electron probe analysis show that the formed nitride scale consists of two layers, an outward-growing and an inward-growing layer. The outward-growing part of the scale consists mainly of TiN, while the inward-growing part is composed of Ti2AlN. The hardness and wear resistance of the nitrided alloys are improved and at 940 degreesC nitridation, Knoop hardness value of TiAl based alloys can reach 1286 kg/mm(2).

引用

页码：837 / 840

页数：4