莫来石/氧化铝预应力涂层增强氧化铝的弯曲强度和抗热震性能

郝鸿渐, 李海燕, 万德田, 包亦望, 李月明

Enhanced Flexural Strength and Thermal Shock Resistance of Alumina Ceramics by Mullite/Alumina Pre-stressed Coating

HAO Hongjian, LI Haiyan, WAN Detian, BAO Yiwang, LI Yueming

表1 不同石英含量制备预应力氧化铝的涂层和基体残余应力的计算结果

Table 1 Calculation of residual stresses of coatings and substrates in pre-stressed Al2O3 fabricated with different mass fractions of quartz

Sample Ec/GPa Es/GPa αc/(×10-6, K-1) αs/(×10-6, K-1) hc/μm hs/μm ΔT σc/MPa σs/MPa C5-A 91.36 380.11 6.69 7.58 50 1450 1000 ℃ -119.66 4.80 C10-A 80.18 380.11 6.06 7.58 50 1450 1000 ℃ -151.94 6.09 C15-A 73.33 380.11 5.33 7.58 50 1450 1000 ℃ -181.86 7.29 C20-A 67.71 380.11 5.04 7.58 50 1450 1000 ℃ -189.74 7.60 C25-A 62.14 380.11 4.72 7.58 50 1450 1000 ℃ -196.17 7.86 C30-A 58.31 380.11 4.41 7.58 50 1450 1000 ℃ -197.69 7.91