Scholarlink

<p>In the present investigation, different amounts of NiCoCrAlYTa powders were added to yttria-stabilized zirconia (YSZ) powders to produce denser YSZ-NiCoCrAlYTa composite coatings employing atmospheric plasma spraying (APS). Furthermore, the microstructures of the coating were investigated by x-ray diffraction (XRD), optical microscopy (OM) and scanning election microscopy (SEM), and the cavitation erosion behavior of composite coatings and YSZ coating as a reference was evaluated using a laboratory test with vibration-induced cavitation erosion following the pattern of the ASTM standard G 32. The results indicate that the synergistic effect of 3D pores, 2D pores and microscopic cracks in YSZ coatings and the weak bonding between splats are responsible for the failure of the coatings during cavitation erosion. Fortunately, NiCoCrAlYTa can fill the microscopic pores and cracks in the YSZ coating and promote the dense microstructure of the YSZ coating, coupled with the stacking of metal–ceramic splats to enhance the cohesive strength of the coating, so the composite coating exhibits excellent cavitation erosion resistance.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Microstructure, Mechanical Properties and Cavitation Erosion Resistance of YSZ-NiCoCrAlYTa Composite Coatings Prepared By APS

  • 期刊论文

  • 发表日期：

    2025年12月7日

查看全文
  • Xin Wang,
  • Zhe Wang,
  • Pen Jin,
  • Peilin Yuan,
  • Fengying Li,
  • Xiaodong Wei,
  • Chufeng Sun

摘要

In the present investigation, different amounts of NiCoCrAlYTa powders were added to yttria-stabilized zirconia (YSZ) powders to produce denser YSZ-NiCoCrAlYTa composite coatings employing atmospheric plasma spraying (APS). Furthermore, the microstructures of the coating were investigated by x-ray diffraction (XRD), optical microscopy (OM) and scanning election microscopy (SEM), and the cavitation erosion behavior of composite coatings and YSZ coating as a reference was evaluated using a laboratory test with vibration-induced cavitation erosion following the pattern of the ASTM standard G 32. The results indicate that the synergistic effect of 3D pores, 2D pores and microscopic cracks in YSZ coatings and the weak bonding between splats are responsible for the failure of the coatings during cavitation erosion. Fortunately, NiCoCrAlYTa can fill the microscopic pores and cracks in the YSZ coating and promote the dense microstructure of the YSZ coating, coupled with the stacking of metal–ceramic splats to enhance the cohesive strength of the coating, so the composite coating exhibits excellent cavitation erosion resistance.