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<p>This paper systematically investigates the impact of cold spraying temperature on the microstructure and high-temperature oxidation resistance of Cr coatings. Three types of Cr coatings are prepared using different temperature parameters. The results show that as the spraying temperature increased from 500 to 700&#xa0;°C, the average grain size decreased from 3.4 to 0.5&#xa0;μm. The refinement of grains promoted the rapid formation and continuous growth of the Cr<sub>2</sub>O<sub>3</sub> oxide layer by increasing the grain boundary density. The study reveals the mechanism by which cold spraying temperature optimizes the oxidation resistance of coatings through the regulation of grain size.</p>

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Effect of Cold Spray Temperature on Microstructure and High-Temperature Oxidation Resistance of Cr Coatings

  • 期刊论文

  • 发表日期：

    2025年10月24日

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  • Song Zeng,
  • Xinliang Zhang,
  • Chang Jiang,
  • Siqi Zeng,
  • Youxing He,
  • Yiyou Wu,
  • Xuebing Yang,
  • Wenfu Chen,
  • Linwei Zhang,
  • Jiuming Yu

摘要

This paper systematically investigates the impact of cold spraying temperature on the microstructure and high-temperature oxidation resistance of Cr coatings. Three types of Cr coatings are prepared using different temperature parameters. The results show that as the spraying temperature increased from 500 to 700 °C, the average grain size decreased from 3.4 to 0.5 μm. The refinement of grains promoted the rapid formation and continuous growth of the Cr2O3 oxide layer by increasing the grain boundary density. The study reveals the mechanism by which cold spraying temperature optimizes the oxidation resistance of coatings through the regulation of grain size.