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中文摘要: 环境障涂层体系中 Si 粘结层的制备工艺对涂层性能有重要影响， 性能良好的 Si 粘结层可以有效提高环境
障涂层与 SiC 复合材料结合强度和改善涂层与基体热膨胀的匹配程度。 本文主要研究 Si 粘结层的制备工艺对涂
层组织及性能的影响， 采用大气等离子喷涂技术在 SiC 基片上制备 Si 粘结层， 研究喷涂电流对 Si 粘结层表面粗
糙度、 相组成与形貌、 与基体的结合强度和硬度的影响。 综合分析发现， 喷涂电流为 400 A 时， 颗粒熔融状态良
好， 涂层表面粗糙度 Ra 为 (3.15±0.35) μm， 截面孔隙率为 4.9%， 涂层结合优于其他三组工艺， 其平均结合强度
值为 16 MPa。
Abstract:The spraying process of the Si bond coat in the environmental barrier coating system has an important
influence on the quality of the coating. The Si bond coat with optimized spraying parameters will increase the
bonding strength between the environmental barrier coating and the SiC substrate and improve the thermal
expansion mismatch. In this work, the atmospheric plasma spraying technology was utilized to prepare Si bond
coat on SiC substrate. We mainly studied the influence of the spraying process of the Si bonding coating on its
microstructure and properties, and the effect of spray current on the surface roughness, phase composition and
morphology, adhesive strength and hardness are investigated systematically. The Si bond coat with spraying
current of 400 A demonstrates the surface roughness Ra of (3.15±0.35) μm, the cross-sectional porosity of 4.9%
as well as an average adhesive strength of 16 MPa.
文章编号： 中图分类号：TG174.4 文献标志码：
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引用文本：
罗志新,王浩宇,张佳平,张洁,王京阳.喷涂工艺对 SiC 基片上制备的 Si 粘结层组织及性能的影响[J].热喷涂技术,2021,13(4):7-13.
罗志新,王浩宇,张佳平,张洁,王京阳.喷涂工艺对 SiC 基片上制备的 Si 粘结层组织及性能的影响[J].热喷涂技术,2021,13(4):7-13.