成型压力对反应烧结碳化硅显微结构与性能的影响
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摘要
研究了不同成型压力对反应烧结碳化硅显微结构与性能的影响。结果表明:随着成型压力的增加,反应烧结碳化硅材料的密度和强度呈现出先增后减的趋势。当压力为25MPa时,材料具有最高密度和强度,分别为密度3.074g/cm3、抗弯强度401 MPa、抗压强度2211 MPa。同时,烧结体中各相分布均匀,游离硅尺寸较小。
Influence of different pressure on reaction sintered silicon carbide′s microstructure and properties were studied.The results show that:with the increase of pressure,reaction bonded silicon carbide material density and strength showed a trend of first increasing and then decreasing.When the pressure is at 25 MPa,the material have the highest density and strength,respectively,density is 3.074g/cm3,bending strength is 401 MPa,compressive strength is 2211 MPa.At the same time,the phases distributed uniformly in the sintered body,the size of the free silicon is small.
Influence of different pressure on reaction sintered silicon carbide′s microstructure and properties were studied.The results show that:with the increase of pressure,reaction bonded silicon carbide material density and strength showed a trend of first increasing and then decreasing.When the pressure is at 25 MPa,the material have the highest density and strength,respectively,density is 3.074g/cm3,bending strength is 401 MPa,compressive strength is 2211 MPa.At the same time,the phases distributed uniformly in the sintered body,the size of the free silicon is small.
引文
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2 黄清伟,乔冠军,高积强,等.生坯制备参数对反应烧结碳化硅显微结构与性能的影响[J].稀有金属材料与工程,2001(2):149
3 武七德,刘开松,屠隆,等.成型方式对反应烧结碳化硅显微结构及强度的影响[J].陶瓷学报,2011(3):407
4 Scafe E,Gtunta G,Fabbri L,et al.Mechanical behavior of scilicon-silicon carbide composites[J].J Eur Ceram Soc,1996,16(7):703
5 Wilhelm M,Kornfeld M,Wruss W.Development of SiC-Si composites with fine-grained SiC microstructures[J].J Eur Ceram Soc,1999,19(12):1833