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In Situ Synthesis of Nanoscale WC-η Composite Powder and its Application in Cermet Coating

机译:纳米WC-η复合粉末的原位合成及其在金属陶瓷涂层中的应用

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摘要

Nanoscale WC-η composite powder was synthesized by in situ reaction of tungsten oxide, cobalt oxide and carbon black mixtures for fabricating the nanostructured WC-based coating in which the conventional Co matrix was substituted for η phases (i.e. Co_6W_6C, Co_3W_3C, Co_2W_4C, etc) due to their excellent corrosion resistance to molten zinc. The effects of the carbon addition of the raw powders and the temperature on the phase constitutions of the as-synthesized composite powders have been investigated. Subsequently, the powder was agglomerated and heat-treated to prepare the feedstock for high velocity oxy-fuel (HVOF) thermal spraying. By optimizing the preparation processes, a nanostructured WC-based coating with significantly improved mechanical properties and corrosion resistance to molten zinc has been obtained as compared to conventional coatings.
机译:通过氧化钨,氧化钴和炭黑混合物的原位反应合成纳米级WC-η复合粉末,以制备纳米结构的WC基涂层,其中用传统的Co基体代替η相(即Co_6W_6C,Co_3W_3C,Co_2W_4C等) ),因为它们对熔融锌具有出色的耐腐蚀性。研究了原料粉末的碳添加和温度对合成后的复合粉末的相组成的影响。随后,将粉末附聚并热处理以制备用于高速氧-燃料(HVOF)热喷涂的原料。通过优化制备工艺,与常规涂料相比,已获得具有明显改善的机械性能和耐熔融锌腐蚀性能的纳米结构WC基涂料。

著录项

  • 来源
  • 会议地点 Hamburg(DE)
  • 作者单位

    College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing 100124, P. R. China xysong@bjut.edu.cn;

    College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing 100124, P. R. China;

    College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing 100124, P. R. China;

    College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing 100124, P. R. China;

    College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing 100124, P. R. China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    In situ synthesis; WC-η composite powder; Nanostructured coating; Corrosion resistance;

    机译:原位合成;WC-η复合粉末;纳米结构涂层;耐蚀性;

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