Influence of HVO-AF parameters and particle size on elastic modulus of WC-12Co coatings

被引：0

作者：

Zha, Bai-Lin ^{[1
]}

Gao, Shuang-Lin ^{[1
]}

Qiao, Su-Lei ^{[1
]}

Huang, Ding-Yuan ^{[1
]}

Yuan, Xiao-Yang ^{[2
]}

Lin, Hao ^{[1
]}

机构：

[1] Second Artillery Engineering University, Xi'an

[2] Xi'an Jiaotong University, Xi'an

来源：

Cailiao Gongcheng/Journal of Materials Engineering | 2015年 / 43卷 / 04期

关键词：

Elastic modulus; HVO-AF; Nanostructured coating; WC-12Co;

D O I：

10.11868/j.issn.1001-4381.2015.04.016

中图分类号：

学科分类号：

摘要：

The three kinds of WC-12Co coatings were sprayed by HVO-AF(high velocity oxygen-air fuel spray)equipment, which temperature can range from 1400℃ to 2800℃, with three different spray parameters of HVOF (high velocity oxygen fuel spray), HVO-AF (high velocity oxygen-air fuel spray) and HVAF(high velocity air fuel spray), respectively. The elastic modulus of the coatings was tested with the method of Knoop, and the microhardness was recorded. The microstructure, chemical composition and the phase composition were studied by SEM, EDS and XRD. The results show that the nano WC-Co coatings are uniform and dense, with low porosity, with greatly improved microhardness and elastic modulus than micro-coating. The average hardness and elastic modulus of nano WC-Co coatings at HVO-AF condition are the highest (1515 MPa and 308 GPa), while the average hardness and elastic modulus at HVOF and HVAF conditions are 1390 MPa, 286 GPa and 1469 MPa, 270 GPa, respectively. Compared with this, the average hardness and elastic modulus of WC-Co micro-coatings at HVO-AF are 1065 MPa and 242 GPa. The appropriate flame flow temperature at HVO-AF condition can control the decomposition of the WC-12Co powders effectively, so, elastic modulus measured is the highest. ©, 2015, Beijing Institute of Aeronautical Materials (BIAM). All right reserved.

引用

页码：92 / 97

页数：5

共 17 条

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