贾芳,彭浩然,冀晓鹃,庞小肖.烧结温度对氧化铪粉末性能的影响及喷涂涂层性能研究[J].热喷涂技术,2022,14(3):58~63.
烧结温度对氧化铪粉末性能的影响及喷涂涂层性能研究
Influence of Sintering Temperature on Propertiesof Hafnium oxide Powder and Properties of Sprayed Coatings
  
DOI:DOI 10.3969/j.issn.1674-7127.2022.03-007
中文关键词:  氧化铪  烧结温度  微观组织结构  等离子喷涂  力学性能
英文关键词:Hafnium oxide  Sintering temperature  Microstructure  Plasma spraying  Mechanical properties
基金项目:
           
作者单位
贾芳 矿冶科技集团有限公司
北京市工业部件表面强化与修复工程技术研究中心
特种涂层材料与技术北京市重点实验室
彭浩然 矿冶科技集团有限公司
北京市工业部件表面强化与修复工程技术研究中心
特种涂层材料与技术北京市重点实验室
冀晓鹃 矿冶科技集团有限公司
北京市工业部件表面强化与修复工程技术研究中心
特种涂层材料与技术北京市重点实验室
庞小肖 矿冶科技集团有限公司
北京市工业部件表面强化与修复工程技术研究中心
特种涂层材料与技术北京市重点实验室
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中文摘要:
      本试验采用喷雾干燥 - 高温烧结的方法制备了氧化铪粉末, 并采用大气等离子喷涂 (APS) 技术在钢基体表 面制备了氧化铪涂层, 研究了烧结温度对氧化铪粉末以及涂层微观组织和性能的影响。 结果表明随着烧结温度从 1000 ℃升高至 1300 ℃, 氧化铪粉末微观组织变化不明显, 微颗粒也未发生明显长大, 当温度升高至 1400℃以上 时, 粉末内部组织逐渐变得致密, 微颗粒开始微熔连接, 形成网络状骨架; 当烧结温度为 1000 ℃至 1300 ℃时, 粉末颗粒强度处于相对较低的水平, 随着烧结温度升高至 1400 ℃、 1500 ℃时, 粉末颗粒强度逐渐增大; 1400 ℃ 烧结后的氧化铪粉末经大气等离子喷涂形成的涂层组织均匀结构较致密, 涂层孔隙率为 3.9%, 涂层平均显微硬 度为 552.24 HV0.3, 涂层结合强度均值达到 24.78 MPa。
英文摘要:
      In this experiment, hafnium oxide powder was prepared by spray drying-high temperature sintering method and hafnium oxide coating was prepared on the surface of steel substrate by atmospheric plasma spraying (APS). The effects of sintering temperature on the microstructure and properties of hafnium oxide powder and coating were studied. The results showed that as the sintering temperature increased from 1000 ℃ to 1300 ℃ , the microstructure of hafnium oxide powder didn't changed significantly, and the micro-particles didn't grow up obviously. When the sintering temperature reached 1400 ℃ or higher, the micro-particles began to be micro-melted and connected with network-like framework. When the sintering temperature was between 1000 ℃ to 1300 ℃ , the strength of powder particles was relatively low. With the sintering temperature raised to 1400 ℃ and 1500 ℃ , the strength of powder particles gradually increased. The structure of coating prepared by hafnium oxide powder after 1400 ℃ sintering treatment was uniform and relatively dense. The porosity of hafnium oxide coating was 3.9%, the average microhardness of the coating was 552.24 HV0.3. The average bonding strength of the coating reached 24.78 MPa.
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