The oxidation behavior of the WC-10 wt.% Ni3Al composite fabricated by spark plasma sintering

被引：34

作者：

Li, Xiaoqiang ^{[1
]}

Zhang, Minai ^{[1
]}

Zheng, Donghai ^{[1
]}

Cao, Ting ^{[1
]}

Chen, Jian ^{[1
]}

Qu, Shengguan ^{[1
]}

机构：

[1] S China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Guangzhou 510640, Guangdong, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 629卷

关键词：

WC-10Ni(3)Al composite; Spark plasma sintering; Oxidation resistance; Kinetics parameters; CR CEMENTED CARBIDES; CO HARD METAL; WC-CO; TUNGSTEN CARBIDE; RESISTANCE; NI;

D O I：

10.1016/j.jallcom.2015.01.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The oxidation behavior of the novel WC-Ni3Al composite prepared by spark plasma sintering is investigated. The results indicate that the oxidation resistance of the WC-10 wt.% Ni3Al composite is more excellent than that of the WC-8 wt.% Co composite at high temperature. It probably results from the formation of compact oxide layers and the oxidation products: NiWO4 and Al-2(WO4)(3), which possess lower porosity and consequently provide more efficient passivation effect against oxidation. The activation energies produce a difference between the WC-10 wt.% Ni3Al (169 +/- 1 kJ/mol) and WC-8 wt.% Co (190 +/- 3 kJ/mol) at 600-800 degrees C. Cyclic oxidation experiments reveal that the adhesion of the oxide film for the WC-Ni3Al composite is better than the WC-Co composite which has a positive effect on improving oxidation resistance at high temperature. (C) 2015 Elsevier B.V. All rights reserved.

引用

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页码：148 / 154

页数：7

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