SiCf /SiC 复合材料表面Si/Yb2Si2O7 涂层1 350 ℃抗热冲击和抗热冲刷性能研究

陈易诚, 邓杨芳, 张乐, 韦林, 李其连, 周国栋

doi:10.16577/j.issn.1001-1560.2024.0177

材料保护 >

2024 , Vol. 57 >Issue 8: 58 - 64

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0177

研究篇

SiC_f /SiC 复合材料表面Si/Yb₂Si₂O₇ 涂层1 350 ℃抗热冲击和抗热冲刷性能研究

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(1. 中国航发四川燃气涡轮研究院材料工艺室，四川成都 610500;2. 中国航空制造技术研究院高能束流加工技术重点实验室，北京 100024)

张乐(1983-)，博士，高级工程师，主要研究方向涂层技术、化学热处理，E-mail: lezhang868＠163.com

收稿日期: 2024-04-04

修回日期: 2024-05-17

录用日期: 2024-05-25

网络出版日期: 2024-09-23

基金资助

国家科技重大专项(2017-Ⅵ-0020-0092)

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Thermal Shock Resistance and Thermal Erosion Resistance at 1 350 ℃ of Si/Yb₂Si₂O₇ Coatings on Surface of SiC_f/SiC Composites

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(1.Department of Material and Processing，AECC Sichuan Gas Turbine Establishment， Chengdu 610500， China；2.Science and Technology on Power Beam Processes Laboratory， AVIC Manufacturing Technology Institute， Beijing 100024， China)

ZHANG Le(1983-)， Ph.D.， Senior Engineer， Research Focus: Coatings Technology and Chemical Heat Treatment， E-mail: lezhang868＠163.com

Received date: 2024-04-04

Revised date: 2024-05-17

Accepted date: 2024-05-25

Online published: 2024-09-23

Supported by

National Science and Technology Major Project(2017-VI-0020-0092)

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摘要

为了研究Si/Yb2Si2O7涂层在1 350 ℃条件下的抗热冲击和抗热冲刷性能，首先在SiCf/SiC 复合材料上采用真空等离子喷涂技术制备了Si/Yb2Si2O7涂层，并采用金相、物相、SEM、EDS、燃气热冲击设备和燃气热冲刷设备对试样进行了结构及性能表征。结果表明:涂层与SiCf/SiC 复合材料的结合强度为25.01 MPa。经过1 350 ℃燃气热冲击1 000 次，1 350 ℃、550 m/s 燃气热冲刷1 h 后，Yb2Si2O7涂层的表面物相均主要为Yb2Si2O7、Yb2SiO5、Yb2O3和SiO2，抗热冲击和抗热冲刷2 项性能测试结果均达设计要求。涂层结合强度很高，复合材料、Si 层和Yb2Si2O7层耐高温且热匹配性能较好，且面层的抗燃气腐蚀能力很强，是涂层热冲击、热冲刷性能良好的主要原因。燃气热冲刷的燃气燃烧时间比燃气热冲击的总时间短，且热冲刷为恒温连续冲刷，无冷热的剧烈交替变化，故燃气冲刷后涂层边缘处靠近工装装卡的地方未见明显开裂，且连续冲刷后的黑色烧蚀区域较燃气热冲击的面积小。

关键词： SiCf/SiC 复合材料; Si/Yb₂Si₂O₇涂层; 真空等离子喷涂; 抗热冲击; 抗热冲刷

本文引用格式

陈易诚, 邓杨芳, 张乐, 韦林, 李其连, 周国栋 . SiC_f /SiC 复合材料表面Si/Yb₂Si₂O₇ 涂层1 350 ℃抗热冲击和抗热冲刷性能研究[J]. 材料保护, 2024 , 57(8) : 58 -64 . DOI: 10.16577/j.issn.1001-1560.2024.0177

Abstract

In order to study the thermal shock resistance and thermal erosion resistance of Si/Yb2 Si2 O7 coatings at 1 350 ℃， Si/Yb2 Si2 O7 coatings were prepared on SiCf/SiC composites by vacuum plasma spraying technology.Subsequently，the structure and performance of the samples were characterized by metallography， physical phase， SEM， EDS， gas thermal shock equipment and gas thermal flushing equipment.Results showed that the bonding strength between the coating and SiCf/SiC composite material was 25.01 MPa.After 1 350 ℃gas thermal shock for 1 000 times and 1 350 ℃，550 m/s gas thermal scouring for 1 h， the surface phases of the Yb2Si2O7 coating were mainly Yb2Si2O7，Yb2SiO5， Yb2O3 and SiO2， and the test results of thermal shock resistance and thermal erosion resistance both met the design requirements.Furthermore， the coating had high bonding strength.The composite materials， Si layer and Yb2Si2O7 layer were resistant to high temperature and had good thermal matching performance， and the surface layer had strong resistance to gas corrosion， which was the main reason for the good thermal shock and thermal erosion performance of the coating.Besides， the gas combustion time of gas thermal scouring was shorter than the total time of gas thermal shock， and the thermal scouring was a constant temperature continuous scouring without drastic alternation of hot and cold.Therefore， no obvious cracking was observed at the edge of the coating near the tooling after gas scouring，and the black ablation area after continuous scouring was smaller than the area of gas thermal shock.

Key words： SiCf/SiC composites； Si/Yb₂Si₂O₇ ; coating； vacuum plasma spraying； thermal shock resistance； thermal erosion resistance

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