| 等离子喷涂WC-17Co纳米涂层形成及强韧化机理 |
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| 引用本文： | 陈辉,苟国庆,刘艳,涂铭旌.等离子喷涂WC-17Co纳米涂层形成及强韧化机理[J].西南交通大学学报,2008,43(5). |
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| 作者姓名： | 陈辉 苟国庆 刘艳 涂铭旌 |
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| 作者单位： | 1. 西南交通大学材料科学与工程学院,四川,成都,610031
2. 四川大学材料科学与工程学院,四川,成都,610041 |
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| 基金项目： | 四川省成都市科技攻关项目 |
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| 摘 要： | 用等离子喷涂的方法制备WC-17Co纳米涂层和普通涂层,以研究纳米涂层组织的形成机理、力学性能及强韧化机理.研究表明,纳米涂层中存在典型的纳米结构.在纳米WC-17Co喷涂粉末中,WC颗粒上弥散地分布的2~5 nm的亚微粒作为结晶晶核,有利于纳米结构涂层的形成.纳米涂层的硬度、弹性摸量、断裂韧性和结合强度都明显高于普通涂层,细晶强化是其主要强化机制.
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| 关 键 词： | 纳米涂层 强韧化 WC-Co 力学性能 等离子喷涂 |
Formation and Strengthening Mechanisms of Plasma Sprayed Nanostructured WC-Co Coating |
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| CHEN Hui,GOU Guoqing,LIU Yan,TU Mingjing.Formation and Strengthening Mechanisms of Plasma Sprayed Nanostructured WC-Co Coating[J].Journal of Southwest Jiaotong University,2008,43(5). |
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| Authors: | CHEN Hui GOU Guoqing LIU Yan TU Mingjing |
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| Abstract: | Nanostructured and conventional WC-Co coatings were prepared by plasma spray to investigate the formation and strengthening mechanisms of the nanostructured coatings.The results indicate that typical nanostructures exist in the nanostructured coating.The sub-particles of 2-5 nm in size dispersing in the WC grains act as crystallization nuclei,which is beneficial to the formation of nanostructured coating.The hardness,elastic module,fracture toughness and bonding strength of the nanostructured coatings are higher than those of the conventional coatings,with the grain-refining being the main strengthening mechanism. |
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| Keywords: | nanostructured coating strengthening WC-Co mechanical properties plasma spray |
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