Oxidation behavior of TiCxNi1-x coatings as a function of C/N ratio

被引：18

作者：

Ajikumar, P. K. ^{[1
]}

Kamruddin, M. ^{[1
]}

Ravindran, T. R. ^{[1
]}

Kalavathi, S. ^{[1
]}

Tyagi, A. K. ^{[1
]}

机构：

[1] Indira Gandhi Ctr Atom Res, Mat Sci Grp, Kalpakkam 603102, Tamil Nadu, India

来源：

CERAMICS INTERNATIONAL | 2014年 / 40卷 / 07期

关键词：

Oxidation; Raman analysis; Scanning electron microscopy; Thermogravimetry; Titanium carbonitride; TITANIUM CARBONITRIDE; AMORPHOUS-CARBON; MICROSTRUCTURE; NITRIDE; FILM; TIN;

D O I：

10.1016/j.ceramint.2014.03.027

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Titanium nitride, carbide and carbonitride coatings were synthesized on titanium substrates by the thermochemical diffusion process in ammonia, methane and varying compositions of ammonia/methane mixture, respectively. High temperature oxidation resistance of these coatings has been studied as a function of carbon to nitrogen ratio in the coatings. Oxidation experiments were conducted in a thermogravimetric analyzer in oxygen atmosphere at 800 degrees C. XRD, SEM, EDS, XPS and Raman measurements before and after the oxidation studies revealed that the content of sp(3) bonded carbon interspersed in the coatings plays a key role in deciding the oxidation resistance of the coatings. TiC with higher sp(3) carbon showed maximum oxidation resistance and TiN the least. Incorporation of even a small amount of N in TiC and C in TiN is found to drastically alter their oxidation resistance. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：10523 / 10529

页数：7

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