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首页> 外文期刊>Surface Engineering >Mechanical properties and microstructure of WC-10Co-4Cr and WC-12Co thermal spray coatings deposited by HVOF
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Mechanical properties and microstructure of WC-10Co-4Cr and WC-12Co thermal spray coatings deposited by HVOF

机译：HVOF沉积的WC-10Co-4Cr和WC-12Co热喷涂涂层的力学性能和显微组织

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摘要

The present investigation has been conducted in order to determine the microstructural features, hardness and elastic modulus of two different WC-Co and WC-Co-Cr high velocity oxy fuel sprayed coatings. Particular emphasis has been given to the evaluation of the elastic modulus on the surface and cross-section of both coatings, employing three different indenters and the influence of the applied load on such property. For this purpose, both conventional and instrumented indentation tests were carried out on the surface and cross-section of the coatings. The elastic modulus was computed by means of the Oliver and Pharr method (1992; 2004) and compared with the values determined by means of the Marshall et al. method (1982). The values of the elastic modulus found both on the surface and on the cross-section of the samples were approx 250 GPa, which indicates a quasi-isotropic behaviour due to the uniform and dense microstructure observed along both directions.
机译：为了确定两种不同的WC-Co和WC-Co-Cr高速氧燃料喷涂涂料的微观结构特征，硬度和弹性模量，进行了本研究。特别强调了使用三个不同的压头评估两种涂层的表面和横截面的弹性模量，以及施加的载荷对该性能的影响。为此，在涂层的表面和横截面上进行了常规和仪器压痕测试。弹性模量通过Oliver和Pharr方法（1992; 2004）进行计算，并与Marshall等人确定的值进行比较。方法（1982）。在样品的表面和横截面上发现的弹性模量值约为250 GPa，这表明由于沿两个方向均观察到均匀且致密的微观结构，因此具有准各向同性行为。

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