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Issue:
RAPID FABRICATION OF C/SiC COMPOSITES USING CHEMICAL VAPOR INFILTRATION METHOD
Author(s):
XIAO Peng
,
XU Yongdong
,
HUANG Boyun
Pages:
240
-
243
Year:
2002
Issue:
2
Journal:
JOURNAL OF THE CHINESE CERAMIC SOCIETY
Keyword:
碳/碳化硅
;
化学气相浸渗
;
沉积速率
;
有效利用率
;
复合材料
;
Abstract:
为缩短CVI法制备C/SiC复合材料的工艺周期并降低成本, 研究了CVI工艺过程中沉积温度、MTS(CH3SiCl3)摩尔分数和气体流量对SiC沉积速率和MTS有效利用率的影响. 实验结果表明:提高沉积温度, 常压下1 100 ℃时增大MTS摩尔分数 (11%→19%), 都有利于提高SiC沉积速率;提高沉积温度和降低反应物气体流量, 能提高MTS有效利用率. 在优化的工艺条件下, 预制体的微观孔隙内沉积了致密的SiC基体, 沉积速率达到142 μm/h左右, 并有效消除了基体中裂纹的形成. MTS的有效利用率为11%~27%.
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