液相烧结法制备B_4C-SiC复合陶瓷材料的研究
|
摘要
以碳化硼为基体,碳化硅为增强相,氧化铝和氧化钇为烧结助剂,在常压条件下通过液相烧结工艺制备了B_4C-SiC复合材料。测试了其力学性能,并借助SEM对烧结体进行断口形貌观察。结果表明:在本实验条件下,当氧化铝和氧化钇添加量在15 wt%时,材料力学性能最佳,体积密度为2.722 g/cm~3,相对密度为98.8%,抗弯强度为496 MPa,断裂韧性为4.57 MPa·m~(1/2)。显微组织结构致密,晶粒细小、均匀,基本没有气孔。
In this research use boron carbide as substrate material, silicon carbide as enhancement phase, Al2O3 and Y2O3 as sintering additives,B4 C-Si C composite materials were prepared by the liquid-phase sintering process under atmospheric pressure condition.Tested its mechanical properties and oberseved the fracture morphology of sintered body with the help of SEM. The results show that,under this experimental condition, the mechanical properties of the composite materials are best when the sintering additives content is 15 wt %,the volume density is2.722 g/cm~3, the relative density is 98.8%, the bending strength is 496 MPa and the fracture toughness is 4.57 MPaom1/2. The microstructure is compact and the grains are fine and uniform,there were no pores exited in sintered body basically.
In this research use boron carbide as substrate material, silicon carbide as enhancement phase, Al2O3 and Y2O3 as sintering additives,B4 C-Si C composite materials were prepared by the liquid-phase sintering process under atmospheric pressure condition.Tested its mechanical properties and oberseved the fracture morphology of sintered body with the help of SEM. The results show that,under this experimental condition, the mechanical properties of the composite materials are best when the sintering additives content is 15 wt %,the volume density is2.722 g/cm~3, the relative density is 98.8%, the bending strength is 496 MPa and the fracture toughness is 4.57 MPaom1/2. The microstructure is compact and the grains are fine and uniform,there were no pores exited in sintered body basically.
引文
[1] Thevenot F. A review on boron carbide[J]. Key Engineering Materials. 1991, 56/57:59~88.
[2]徐璟玉等.原位生成Ce B6/B4C陶瓷的力学性能和显微组织[J].功能材料. 2009, 2(40):278~280.
[3]周玉.陶瓷材料学[M].哈尔滨:哈尔滨工业大学出版社,1995.
[4]丁硕等.碳化硼材料研究进展[J].材料科学与工艺. 2003, 11(1):101~105.
[5]肖汉宁,高朋召.高性能结构陶瓷及其应用[M].北京:化学工业出版社, 2006.
[6] GERMAN R,SURI P,PARK S. Reviw:liquid phase sintering[J].Journal of Materials Science. 2009, 44:1~39.
[7]毛小东,沈卫平等.液相烧结Si C陶瓷的研究进展[J].材料导报, 2008, 22:194~197.
[8]李文辉,李文新等.碳化硼陶瓷的液相烧结试验研究[J].哈尔滨理工大学学报, 2002, 7(2):73~75.
[9]穆柏春等.陶瓷材料的强韧化[M].北京:冶金工业出版社,2002.
[10]李少峰. B4C-Si C复合材料的制备及性能研究[J].佛山陶瓷,2018, 28(5):12~15.
[11] Hamada S,Hirao K,Yamauchi Y,et al. B4C-Cr B2composites with improved mechanical properties[J]. J Eur Ceram Soc. 2003, 23:561~565.
[2]徐璟玉等.原位生成Ce B6/B4C陶瓷的力学性能和显微组织[J].功能材料. 2009, 2(40):278~280.
[3]周玉.陶瓷材料学[M].哈尔滨:哈尔滨工业大学出版社,1995.
[4]丁硕等.碳化硼材料研究进展[J].材料科学与工艺. 2003, 11(1):101~105.
[5]肖汉宁,高朋召.高性能结构陶瓷及其应用[M].北京:化学工业出版社, 2006.
[6] GERMAN R,SURI P,PARK S. Reviw:liquid phase sintering[J].Journal of Materials Science. 2009, 44:1~39.
[7]毛小东,沈卫平等.液相烧结Si C陶瓷的研究进展[J].材料导报, 2008, 22:194~197.
[8]李文辉,李文新等.碳化硼陶瓷的液相烧结试验研究[J].哈尔滨理工大学学报, 2002, 7(2):73~75.
[9]穆柏春等.陶瓷材料的强韧化[M].北京:冶金工业出版社,2002.
[10]李少峰. B4C-Si C复合材料的制备及性能研究[J].佛山陶瓷,2018, 28(5):12~15.
[11] Hamada S,Hirao K,Yamauchi Y,et al. B4C-Cr B2composites with improved mechanical properties[J]. J Eur Ceram Soc. 2003, 23:561~565.