High-temperature nitridation of the intermetallic compound TiAl at 1000-1200 K

Authors
Thongtem, S Thongtem, T McNallan, MJ
Citation
S. Thongtem et al., High-temperature nitridation of the intermetallic compound TiAl at 1000-1200 K, SURF INT AN, 28(1), 1999, pp. 61-64
Citations number
8
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
SURFACE AND INTERFACE ANALYSIS
ISSN journal
01422421 → ACNP
Volume
28
Issue
1
Year of publication
1999
Pages
61 - 64
Database
ISI
SICI code
0142-2421(199908)28:1<61:HNOTIC>2.0.ZU;2-7
Abstract
The nitridation process of MJ12 (Ti-47Al-2Nb-2Cr) and MJ47 (Ti-47Al-2Nb-2Mn + 0.8TiB(2)) in an atmosphere of purified ammonia has been investigated ov er the temperature range 1000-1200 K, The nitrided alloys showed improvemen t of hardness and wear resistance in this environment. At 1200 K nitridatio n, Knoop hardness values of MJ12 and MJ47 were 1283.6 and 1391.3 kg mm(-2), respectively, and the decrease in wear rate of both alloys was as much as 99%, By using x-ray diffraction, TiN was detected on the surface of the all oys nitrided greater than or equal to 1100 K, Copyright (C) 1999 John Whey & Sons, Ltd.