Improved properties of Ti-Al-N coating by multilayer structure

被引：40

作者：

Chen, Li ^{[1
,2
]}

Du, Yong ^{[1
]}

Xiong, Xiang ^{[1
]}

Chang, Ke K. ^{[1
]}

Wu, Ming J. ^{[3
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[2] Tsinghua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China

[3] Zhuzhou Cemented Carbide Cutting Tools Co Ltd, Zhuzhou 412007, Peoples R China

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2011年 / 29卷 / 06期

基金：

中国国家自然科学基金;

关键词：

TiAlN/TiN nano-multilayer coating; Age-hardening; Oxidation resistance; Cutting performance; MECHANICAL-PROPERTIES; TI1-XALXN COATINGS; PERFORMANCE; OXIDATION; WEAR;

D O I：

10.1016/j.ijrmhm.2011.05.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Multinary Ti-Al-N coatings are used for various applications where hard, wear and oxidation resistant materials are needed. Here, we prepare TiAlN/TiN nano-multilayer coatings with modulation period of similar to 20 nm in order to further improve the properties of Ti-Al-N coating. Annealing of both coatings up to 700 degrees C results in an increase in hardness due to the precipitation of cubic Al-rich domains by spinodal decomposition. Multilayer structure results in an increase in adhesion with substrates from similar to 72 N for Ti-Al-N single layer coating 10 98 N for TiAlN/TiN nano-multilayer coating. Additionally, the interfaces of TiAIN/TiN nano-multilayer coating retard the outward diffusion of metal atoms (Al and Ti) and inward diffusion of O while exposing coatings in air atmosphere with elevated temperature, and thus improve its oxidation resistance. An improved machining performance regardless of continuous cutting and milling is obtained by TiAIN/TiN nano-multilayer coated inserts, which can be attributed to the combined effects of higher adhesion with substrates and better oxidation resistance. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：681 / 685

页数：5

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