西安理工大学硕士学位论文
但其在500℃的弯曲保持率为89.78%，力学性能衰减缓慢，可满足低强度耐高温复合材料的需求，应用于500℃温度范围。碳纤维增强SiC陶瓷基复合材料500℃强度为165.59MPa，可满足较高强度耐高温复合材料的要求。此研究为提高陶瓷基复合材料的耐热性和强度提供了一定的参考。
华东师范大学分数线关键词：耐高温；陶瓷基复合材料；弯曲强度
西安理工大学硕士学位论文
tetrabutyl titanate-ethanol solution can reduce the damage of acidic slurry to the fiber.
Finally,aluminium dihydrogen phosphate,resorcinol and hexamethylenetetramine were added to SiC matrix as adhesives.Carbon fiber reinforced SiC ceramic matrix composites were prepared by hot pressing with slurry impregnation.The effects of powder content,slurry-to-fiber ratio,hot pressing strength and powder size on the mechanical properties of the composites were investigated.DSC,TGA of the slurry and the flexural strength of the composites were tested.the experimental results show that the dehydration and curing of aluminium dihydrogen phosphate can be effectively promoted by adding resorcinol and hexamethylenetetramine to the slurry,which is conducive to the formation of network structure.And the results show that when the powder content is Al(H2PO4)3:SiC=1:1,slurry/fibe=1.5/1,hot pressing pressure is2MPa and powder size is5μm,the mechanical properties of the composites are relatively best(bending strength is 222.14MPa at300o C and165.59MPa at500o C).
In this paper,three kinds of ceramic matrix composites were prepared by matrix modification.The flexural strength of quartz fiber reinforced siloxane hybrid benzoxazine composites is191MPa at300o
C and the bending retention rate is37.2%.It can be ud in the temperature range of300o C.The strength of quartz fiber reinforced Si3N4ceramic matrix composites at500o C is67.91MPa,which is not as good as that of the former,but its bending retention at500o C is89.78%,and its mechanical properties decay slowly,which can meet the requirements of low strength and high temperature resistant composites,and can be applied in the temperature range of500o C.The strength of carbon fiber reinforced SiC ceramic matrix composites at500o C is165.59MPa,which can meet the requirements of high strength and high temperature resistant composites.This study provides a reference for improving the heat resistance and strength of ceramic matrix composites.
Key words:High temperature resistance;Ceramic matrix composites;Bending strength
目录
目录
1绪论 (1)
1.1耐高温复合材料的研究背景及意义 (1)
1.2陶瓷基复合材料的组成、制备工艺及增韧机理 (2)
1.2.1基体 (2)
1.2.2增强体 (2)大海在呼唤
1.2.3界面层 (2)
1.2.4制备工艺 (3)
1.2.5增韧机理 (4)
合肥地质博物馆
1.3陶瓷基复合材料的国内外研究现状 (5)
1.3.1国外研究现状 (5)
1.3.2国内研究现状 (6)三朵玫瑰代表什么
1.4本课题的研究内容和目的 (7)
2硅氧烷杂化苯并噁嗪及其耐高温复合材料 (9)傍人>英语不可数名词
2.1引言 (9)
2.2实验部分 (10)
2.2.1实验原料及仪器 (10)
2.2.2石英纤维增强硅氧烷杂化苯并噁嗪复合材料的制备 (11)
2.2.3结构表征与性能测试 (12)
2.3结果与讨论 (12)
2.3.1硅氧烷杂化苯并噁嗪树脂的合成与表征 (12)
2.3.2硅氧烷杂化苯并噁嗪树脂的材料成型工艺性能 (15)
2.3.3硅氧烷杂化苯并噁嗪的耐热性和复合材料的性能 (17)
2.4本章小结 (21)
初级网络工程师3石英纤维增强Si3N4陶瓷基复合材料 (23)
3.1引言 (23)
3.2实验部分 (23)
3.2.1实验原料及仪器 (23)
3.2.2石英纤维增强Si3N4基陶瓷复合材料的制备 (24)
3.2.3结构表征与性能测试 (25)
怎么做手工作品3.3结果与讨论 (25)
3.3.1磷酸盐浆料的固化机理 (25)
3.3.2磷酸盐浆的差热扫描量热分析 (26)
3.3.3磷酸盐浆料的热重分析 (27)
