کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7989864 | 1515947 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Toughening effect and mechanical behaviour of SiC@SiO2 whisker-reinforced vitrified diamond composites
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
In this study, core-shell structured silica-coated silicon carbide (SiC@SiO2) whisker reinforced vitrified matrix composites with four distinct whisker concentrations were prepared by pressureless sintering. The effects of SiC@SiO2 core-shell filler on the morphology, mechanical properties, open porosity, and Rockwell hardness of the sample were investigated. The mechanical behaviour and void structures were correlated with the microstructure evolution, including the whisker/matrix interaction. When the whisker added fractions were 4Â wt% (SiC whisker) and 3Â wt% (SiC@SiO2 whisker), the flexural strength of the samples reached their maximum values of about 72.13Â MPa and 71.60Â MPa, respectively. Furthermore, the bending strength of the SiC@SiO2 whisker (2Â wt%) reinforced vitrified composites was 71.51Â MPa, and the open porosity and hardness were 23.69% and 48.5 HRB, respectively; these values were higher than those for the composites with the SiC whiskers (2Â wt%). This result can be attributed to the protective coating of the SiO2 shell and the good wetting between the SiC@SiO2 filler and the glass bond.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Refractory Metals and Hard Materials - Volume 71, February 2018, Pages 190-197
Journal: International Journal of Refractory Metals and Hard Materials - Volume 71, February 2018, Pages 190-197
نویسندگان
Yuhang Yin, Jiabin Fang, Zengfeng Qin, Kai Liu, Renhe Yang,