Microstructure and mechanical properties of TiB2-Ni composite coating - 文章详情页

作者：

Zhu, Hongbin (Zhu, Hongbin.) | Li, Hui (Li, Hui.) | Li, Zhuoxin (Li, Zhuoxin.)

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摘要：

The　TiB2-Ni　composite　powder　feedstock　was　fabricated　by　agglomeration　and　sintering　method.　This　powder　was　used　to　deposit　TiB2-Ni　coating　by　two　thermal　spray　technologies,　atmospheric　plasma　spray　(APS)　and　high　velocity　oxygen　fuel　spray　(HVOF).　The　microstructure,　phase　constitution,　porosity,　hardness　and　fracture　toughness　of　two　sprayed　TiB2-Ni　coatings　were　compared　and　analyzed.　The　results　showed　that　the　HVOF　sprayed　TiB2-Ni　coating　had　more　compact　structure,　larger　TiB2　content,　higher　hardness　and　better　fracture　toughness　than　the　APSed　coating.　The　TiB2　in　two　coatings　had　no　obviously　deboronization　and　oxidation.　However,　the　TiB2　in　APS　process　was　dissolved　in　metallic　phase　to　form　a　large　number　of　brittle　Ni20Ti3B6　phases.　This　dissolution　reaction　reduced　the　TiB2　content　in　coating　and　it　was　the　main　reason　for　the　lower　hardness　and　worse　fracture　toughness　of　APSed　TiB2-Ni　coating.　©,　2014,　Harbin　Research　Institute　of　Welding.　All　right　reserved.

关键词：

Composite coatings Fracture toughness Hardness HVOF thermal spraying Microstructure Nickel compounds Phase shifters Plasma jets Plasma spraying Sintering Sprayed coatings Titanium compounds

作者机构：

[ 1 ] [Zhu, Hongbin]School of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Zhu, Hongbin]Mining and Metallurgy Research Institute of Beijing, Beijing; 100160, China
[ 3 ] [Li, Hui]School of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Li, Zhuoxin]School of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China

通讯作者信息：

[li, zhuoxin]school of materials science and engineering, beijing university of technology, beijing; 100124, china

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