Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 35    No. 9    September 2025

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Influence of W-doping on microstructure, mechanical and thermal properties of TiAlSiN coatings
Xu SUN1, Wen HU2, Li CHEN1,2, Jian-chuan WANG1

1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. Zhuzhou Cemented Carbide Cutting Tools Co., Ltd., Zhuzhou 412007, China

Abstract:The effect of W-doping on the structure and properties of TiAlSiN coatings was investigated through scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, and nanoindentation. Tungsten doping in the coatings forms both substitution solid solution of Ti and/or Al in TiAlN and W simple substance. W-addition improves the surface quality of the coatings. Ti0.46Al0.45Si0.09N, Ti0.43Al0.46Si0.08W0.03N, and Ti0.41Al0.46Si0.07W0.06N present similar hardness of (29.1±0.4), (29.7±1.1), and (30.2±1.0) GPa, respectively. During annealing, Ti0.41Al0.46Si0.07W0.06N achieves peak hardness of (35.3±1.0) GPa at 1100 °C, whereas those of Ti0.46Al0.45Si0.09N and Ti0.43Al0.46Si0.08W0.03N are only (33.1±0.8) and (33.9±0.8) GPa at 1000 °C. Furthermore, moderate W-addition (3 at.%) upgrades the oxidation resistance of TiAlSiN. After oxidation at 1000 °C for 10 h, the oxide thicknesses of Ti0.46Al0.45Si0.09N, Ti0.43Al0.46Si0.08W0.03N, and Ti0.41Al0.46Si0.07W0.06N are ~0.70, ~0.52, and ~0.90 μm, respectively.

 

Key words: TiAlSiWN coating; cathodic arc evaporation; structural evolution; hardness; thermal stability; oxidation resistance

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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