The bonding strength between the coating and C/C matrix increases slightly after ion exchange, which can be attributed to the good matching of the thermal expansion coefficient between FHA and C/C.

• 离子交换后其涂层与基体的结合强度略有增强，其原因是FHA的热膨胀系数与碳／碳复合材料基体更为匹配，涂层的残余应力减小。