| 料浆涂覆法制备W-Si-ZrO_2-Y_2O_3高温抗氧化涂层的组织与高温氧化行为 |
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| 引用本文： | 范衍,范景莲,李威,李鹏飞,杨铭.料浆涂覆法制备W-Si-ZrO_2-Y_2O_3高温抗氧化涂层的组织与高温氧化行为[J].粉末冶金材料科学与工程,2016(5):754-759. |
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| 作者姓名： | 范衍 范景莲 李威 李鹏飞 杨铭 |
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| 作者单位： | 中南大学粉末冶金国家重点实验室,长沙,410083 |
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| 基金项目： | 国家自然科学基金重点项目(51534009) |
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| 摘 要： | 采用料浆涂覆和多步反应烧结工艺在难熔钨合金表面制备W-Si-ZrO_2-Y2O3高温抗氧化陶瓷复合涂层,对涂层的成分、组织特征及1 700℃下的抗氧化性能进行分析。结果表明,在反应烧结过程中涂层形成了以WSi2为主体,ZrO_2和Y2O3均匀分布的多相陶瓷复合结构,涂层与基体形成良好的冶金结合。涂层在1 700℃空气环境中具有良好的抗氧化性能,高温下其表面生成光滑致密的Si O2玻璃膜,有效抗氧化寿命达14 h。
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| 关 键 词： | 难熔金属 钨合金 WSi2 反应烧结 高温抗氧化 涂层 显微组织 |
Microstructure and oxidation behavior of W-Si-ZrO2-Y2O3 high temperature oxidation resistant coating preparated by slurry spraying |
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| Abstract: | The high temperature oxidation resistant W-Si-ZrO2-Y2O3 ceramics composite coating on the W alloy substrate was prepared by slurry depositing and multistep reaction sintering. The structure, phase composition and oxidation behavior under 1700℃ in the air of the coating were investigated. The results show that the ceramics composite coating is mainly formed by WSi2 in which ZrO2and Y2O3 are distributed dispersively, and the interface between the coating and substrate exhibits metallurgic combination. Meanwhile, the coating shows good oxidation resistance performance during the oxidation under 1700℃ in the air. In this process, densified and smooth SiO2 thin film appears and covers the coating surface. The coating can provide a effective protection to the W alloy substrate for 14 h. |
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| Keywords: | refractory metal W alloy WSi2 reaction sintering high temperature oxidation resistance coating microstructure |
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