Densification, β → α transformation and nanoindentation studies of SiCW/SiC composites fabricated by spark plasma sintering

被引：0

作者：

Lodhe, Mangesh ^{[1
]}

Bhargav, Amit ^{[1
]}

Wasan, Awin ^{[2
]}

Logesh, G. ^{[2
]}

Parmar, Rajeev ^{[3
]}

Balasubramanian, M. ^{[2
]}

机构：

[1] Maulana Azad Natl Inst Technol, Dept Mat & Met Engn, Bhopal 462003, India

[2] Indian Inst Technol Madras, Dept Met & Mat Engn, Chennai 600036, Tamil Nadu, India

[3] Maulana Azad Natl Inst Technol, Dept Chem Engn, Bhopal 462003, India

来源：

JOURNAL OF THE KOREAN CERAMIC SOCIETY | 2024年 / 61卷 / 04期

关键词：

SiCW/SiC; Densification; Spark plasma sintering; Twin boundaries (TBs); MECHANICAL-PROPERTIES; ELASTIC-MODULUS; HIGH-PRESSURE; MICROSTRUCTURE; CARBIDE; TEMPERATURE; CERAMICS; CARBON; DEFECTS;

D O I：

10.1007/s43207-024-00384-y

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Polycarbosilane-derived SiCW/SiC composites were processed by spark plasma sintering (SPS). Whisker-reinforced composites were densified with faster rates to a maximum density of similar to 98%, indicative of positive influence of SiC whiskers on densification behavior. Electron backscattered diffraction study confirmed the presence of twins in the sintered composites. A misorientation angle of 60 degrees resembled to {111} twin boundaries. Twin density was found to increase with SPS temperature and whisker contest. Twin boundaries were found to be responsible for beta -> alpha SiC transformation. Hardness increased sharply with the increase in whisker content and a decrease in grain size. The maximum hardness of 23.4 GPa was observed in 20% SiCW/SiC composite. Nanoindentation study reflects the positive effect of whiskers on hardness and elastic modulus.

引用

页码：644 / 653

页数：10

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