Tiの窒化について

DOI Web Site Web Site 被引用文献8件

書誌事項

タイトル別名
  • Nitriding of Titanium
  • Ti ノ チッカ ニ ツイテ

この論文をさがす

抄録

A kinetic study of the nitriding process of titanium in nitrogen stream was carried out in order to establish a method to improve the frictional properties of titanium. The diffusion layer formed by nitriding was covered by a very thin compound layer (TiN). The maximum hardness of the diffusion layer was above Vickers 1000, but the rate of its growth was comparatively low. The rate of reaction of titanium with nitrogen was found to follow the parabolic law at 800∼900°, and the rate-controlling process was considered to be the diffusion process in both the compound layer and the diffusion layer. As the rate of growth of the diffusion layer is considered to be controlled exclusively by the solubility and the diffusion coefficients of nitrogen in α-titanium, both of which are functions of temperature only, it is necessary to operate at higher temperature and for longer time in order to make the hardened layer deeper. However, the nitriding at a temperature above the transformation point of titanium is not practical because of the formation of surface reliefs produced in the course of β→α transformation and the deformation of material nitrided at high temperature. Therefore, it is concluded that the most practical nitriding temperature is about 850°C. The diffusion coefficients of nitrogen in α-titanium and the compound layer were also determined at 850°C as follows: Dα=1.3×10−11 cm2/sec and Dγ=1.4×10−12 cm2/sec.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 24 (9), 565-569, 1960

    公益社団法人 日本金属学会

被引用文献 (8)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ