Nagae, M Okada, S Nakanishi, M Takada, J Hiraoka, Y Takemoto, Y Hida, M Kuwahara, H Yoo, MK 2024-01-21T17:42:38Z 2024-01-21T17:42:38Z 2021-09-01 1998-01 0263-4368 https://pubs.kist.re.kr/handle/201004/143448 For Mo-0.5 mass% Ti and pure Mo alloy nitrided in a NH3 gas at a relatively low temperature of 1373 K, microstructural observations through optical and transmission electron microscopes, X-ray diffraction analysis and hardness measurements were carried out. A surface nitriding layer with very high hardness of approximately H nu similar to 1800 consisted of two Mo-nitride regions: an outer one of gamma-Mo2N and an inner one of beta-Mo2N. The inward diffusion of nitrogen is a rate-controlling process in the growth of the surface nitriding layer. In Mo-Ti alloy additionally an internal nitriding layer with relatively high hardness of H nu similar to 800 was formed beneath the surface nitriding layer. Such high hardness in the internal nitriding layer was found to result from the uniform dispersion of extremely fine plate-like particles of titanium nitride. The particles are approximately 0.4 nm thick and have coherent strain field in the matrix. (C) 1998 Elsevier Science Ltd. All rights reserved. English ELSEVIER SCI LTD Nitriding of dilute Mo-Ti alloys at a low temperature of 1373 K Article 10.1016/S0263-4368(98)00005-5 1 INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, v.16, no.2, pp.127 - 132 INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 16 2 127 132 scie scopus 000076033400005 2-s2.0-0031644723 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article Mo-Ti alloy