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author:

江品颐 (江品颐.) [1] | 刘海华 (刘海华.) [2] | 黄向东 (黄向东.) [3] (Scholars:黄向东)

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CQVIP PKU CSCD

Abstract:

由液相渗硅工艺(LSI)制得了2D CF/SiC复合材料,经过XRD分析得知材料中SiC均为β相。经过同质量比的K_3Fe(CN)_6与KOH混合水溶液对其进行腐蚀,由SEM观察腐蚀后2D CF/SiC复合材料的形貌,发现其中SiC呈现细等轴晶和粗大晶粒两种不同的形貌。分析认为LSI工艺制备2DCF/SiC复合材料中生成的SiC有两种生成机制:Si原子通过空位机制向碳中扩散形成无定型SiC,在保温过程中结晶形成细晶SiC层;C原子扩散进入熔融态硅中形成C—Si基团,由于温度梯度和浓度梯度的存在,在远离C/SiC界面处过饱和析出,通过溶解-沉淀机制形成粗大的SiC晶体,在晶粒的长大过程中伴随着层...

Keyword:

2D CF/SiC复合材料 层错 扩散 晶粒生长 液相渗硅 溶解-沉淀

Community:

  • [ 1 ] 福州大学材料科学与工程学院

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Source :

复合材料学报

ISSN: 1000-3851

CN: 11-1801/TB

Year: 2017

Issue: 07

Volume: 34

Page: 1561-1568

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 3

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