SiCO陶瓷隔热复合材料TaSi2-MoSi2硼硅酸盐玻璃涂层制备与性能
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(国防科学技术大学新型陶瓷纤维及其复合材料重点实验室,长沙 410073)

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林浩,1990年出生,硕士研究生,主要从事耐高温涂层研究工作。E-mail:linhaofj@126.com

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TB35

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国家自然科学基金(51172279;51302317)湖南省高校科技创新团队支持计划;国防科学技术大学陶瓷纤维与复合材料技术创新群体


Preparation and Properties of TaSi2-MoSi2 Borosilicate Glass Coating For SiCO Ceramic Heat Insulation Composite
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(Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha 410073)

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    摘要:

    为了提高SiCO陶瓷隔热复合材料的抗氧化抗热震性能,通过刷涂法制备SiCO陶瓷隔热复合材料TaSi2-MoSi2硼硅酸盐玻璃涂层,借助扫描电镜、X射线衍射等手段对硼硅酸盐玻璃含量分别占23%、31%、38%、41%的涂层进行微观形貌和相组成分析,对不同含量的涂层进行1 500℃氧化5 min,取出后冷却至室温的重复循环试验。结果表明:在循环次数达到25次,氧化总时间达到125 min后,硼硅酸盐玻璃含量占38%的TaSi2-MoSi2硼硅酸盐玻璃涂层表面具有最少的孔洞和裂纹,涂层的失重率为-2.1%,说明该涂层具有最好的抗氧化和抗热震性能。。

    Abstract:

    In order to improve the oxidation resistance and thermal shock resistance properties of the TaSi2-MoSi2 borosilicate glass coating for porous SiCO ceramic heat insulation composite, TaSi2-MoSi2 borosilicate glass coating on the surface of SiCO ceramic composites was prepared by brush-air sintering method. The microstructure and phase compositions of the coatings with the content of borosilicate glass respectively of 23%,31%,38%,41% were comparative observed by XRD and SEM with EDS. The thermal cycle experiment of the coated samples was performed by heating for 5 min at 1 500℃,then taking out to cool naturally down to room temperature.The result shows that the TaSi2-MoSi2 borosilicate glass coating with the content of borosilicate glass of 38% has fewest holes and cracks,the mass loss of the coating is -2.1%. It can be concluded that the TaSi2-MoSi2 glass coating with the content of borosilicate glass is 38% has the best oxidation resistance and thermal shock properties.

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林浩,冯军宗,姜勇刚,岳晨午,冯坚. SiCO陶瓷隔热复合材料TaSi2-MoSi2硼硅酸盐玻璃涂层制备与性能[J].宇航材料工艺,2016,46(5):42-45, 53.

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  • 收稿日期:2015-12-24
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  • 在线发布日期: 2017-01-11
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第十一届航天复合材料成形与加工工艺技术中心交流会 征文通知

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