A comparison of the abrasive wear behaviour of HVOF sprayed titanium carbide- and titanium boride-based cermet coatings
A comparison of the abrasive wear behaviour of HVOF sprayed titanium carbide- and titanium boride-based cermet coatings
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DOI：
10.1016/s0043-1648(01)00702-5
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发表时间：
2001-10
期刊：
影响因子：
5
通讯作者：
M. Jones;A. Horlock;P. Shipway;D. McCartney;J. Wood
中科院分区：
文献类型：
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作者：
M. Jones;A. Horlock;P. Shipway;D. McCartney;J. Wood
金属陶瓷涂层通常用于提高各种工程部件的耐磨性。热喷涂技术，例如等离子喷涂和高速氧燃料（HVOF）喷涂通常用于存款这些涂层。本工作概述了一种基于自蔓延高温合成（SHS）技术和随后的超音速火焰喷涂涂层从这些粉末的金属陶瓷粉末生产的路线。Fe、Cr、Ti与C或B粉末的元素混合物的反应产生主要由Fe（Cr）基体和分散的TiC或TiB 2硬质颗粒组成的粉末，其尺寸为约15 μm。由这些粉末沉积的涂层厚度为100μm，并在这些涂层上用500-600μm范围内的氧化铝和二氧化硅磨料进行干砂-橡胶轮磨料磨损试验。这两种涂层的磨损率均上级于由市售混合粉末沉积的Ni（Cr）-Cr 3C 2涂层，含TiB 2涂层的磨损率低于其TiC基涂层。磨损行为的差异是合理的涂层微观结构。
Cermet coatings are commonly employed to enhance the wear resistance of a wide range of engineering components. Thermal spray techniques, such as plasma spraying and high velocity oxy-fuel (HVOF) spraying are commonly utilised to deposit these coatings. This work outlines a route for cermet powder production based on the technology of self-propagating high-temperature synthesis (SHS) and subsequent HVOF spraying of coatings from these powders. Reactions of elemental mixtures of Fe, Cr, Ti and either C or B powders have resulted in powders consisting predominantly of an Fe(Cr) matrix with a dispersion of either TiC or TiB2hard particles, ∼5μm in size. Coatings ∼100μm thick were deposited from these powders and dry sand–rubber wheel abrasive wear tests were performed on these coatings with both alumina and silica abrasives in the 500–600μm size range. Both coatings exhibited wear rates superior to those of Ni(Cr)–Cr3C2coatings deposited from commercially available blended powders with the TiB2-containing coating exhibiting lower wear rates than its TiC-based counterpart. Differences in the wear behaviour are rationalised in terms of the coating microstructures.