Gas nitriding and subsequent oxidation of Ti-6Al-4V alloys.
Ti-6Al-4V alloys consisting of α-Ti grains and intergranular β-Ti islands were nitrided at 850°C for 1 to 12 h under a nitrogen pressure of 1 Pa. With increasing nitriding time, the Ti-N compound layer became thicker, and the α-Ti diffusion zone containing dissolved nitrogen became wider. In the Ti-N compound layer, the initially formed Ti2N became TiN as the nitriding progressed. The nitride layers were oxidized to rutile-TiO2 after oxidation at 700°C for 10 h in air.
Department of Materials Science and Engineering, Myongji University, Yongin, 449-728, South Korea. jcl@mju.ac.kr.
Dong Bok
DB
Lee
Iryna
I
Pohrelyuk
Oleh
O
Yaskiv
Jae Chun
JC
Lee