| Y4Si2O7N2-BN复合材料抗热震性能研究 |
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| 引用本文： | 陈琳,陈继新.Y4Si2O7N2-BN复合材料抗热震性能研究[J].河南师范大学学报(自然科学版),2011,39(5):70-72. |
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| 作者姓名： | 陈琳 陈继新 |
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| 作者单位： | 1. 中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳 110016;中国科学院研究生院,北京 100039
2. 中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳,110016 |
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| 基金项目： | 国家自然科学基金(50802099,51072201) |
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| 摘 要： | 系统地研究了Y4Si2O7N2_BN复合材料的抗热震性能.计算表明,Y4Si2O7N2_30vol.％BN复合材料具有较高的热应力断裂抵抗因子R1值.进一步的实验证明该复合材料的临界热震温差为850～900K.第二相h-BN在热震条件下的层间劈裂愈合机制对复合材料保持较高的残余强度有利.
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| 关 键 词： | Y4Si2O7N2_BN复合材料 抗热震性 热应力断裂抵抗因子R1 |
Thermal Shock Resistance of Y_4Si_2O_7N_(2-)BN Composites |
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| CHEN Lin,CHENG Ji-xin.Thermal Shock Resistance of Y_4Si_2O_7N_(2-)BN Composites[J].Journal of Henan Normal University(Natural Science),2011,39(5):70-72. |
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| Authors: | CHEN Lin CHENG Ji-xin |
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| Institution: | CHEN Lin1,2,CHENG Ji-xin1 (1.Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China,2.Graduate School,Beijing 100039,China) |
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| Abstract: | The thermal shock resistance of Y4Si2O7N2-BN composites has been systematically studied in this paper.The thermal stress fracture resistance parameter,R1 of Y4Si2O7N2-30vol.%BN composite is higher than that of Y4Si2O7N2 and Y4Si2O7N2-20vol.%BN composite.Then the critical temperature difference(ΔTc) of Y4Si2O7N2-30vol.%BN composite is determined to be 850~900 K.The excellent thermal shock resistance is attributed to the lamination structure of h-BN grain which could dissipate the energy by healing up during heating and delamination during cooling. |
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| Keywords: | Y4Si2O7N2-BN composites thermal shock resistance thermal stress fracture resistance parameter R1 |
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