论文部分内容阅读
研究了高温煅烧、等离子炬和等离子流场3种热处理工艺对ZrO2-8%(mol)Y2O3(8YSZ)球形颗粒及其等离子喷涂涂层微观组织结构的影响.结果表明,由等离子炬处理后的8YSZ颗粒制备的等离子喷涂涂层的结合强度最高,平均为25MPa,抗热震性能最好,1200℃恒温5min,水冷、热循环达41次;而采用等离子流场处理的颗粒所制涂层结合强度最差,平均为11MPa,热震时涂层易开裂,热循环次数为17次;高温煅烧的颗粒所制涂层性能依赖于煅烧温度和时间,其中1200℃下煅烧2h的颗粒所制涂层力学性能最优,平均结合强度为21MPa,热循环次数为38次.
The effects of high temperature calcination, plasma torch and plasma flow field on the microstructure of spherical particles of ZrO2-8% Y2O3 (8YSZ) and their plasma spray coatings were studied. The results showed that The plasma spraying coating prepared by 8YSZ particles has the highest bonding strength with an average of 25 MPa, the best thermal shock resistance, constant temperature of 1200 ℃ for 5 minutes, water-cooling and thermal cycling of 41 times. The coatings prepared by plasma- The strength of the worst, with an average of 11MPa, thermal shock cracking of the coating easily, the number of thermal cycles is 17 times; high-temperature calcined particles produced coating performance depends on calcination temperature and time, which 1200 ° C calcined 2h particles coated Layer mechanical properties of the best, the average bond strength of 21MPa, thermal cycles for 38 times.