ZrO_2纤维加入量对莫来石-10vol.%SiC晶须复合材料机械性能和抗热震稳定性的影响
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摘要
为了提高莫来石复合材料的机械性能和抗热震稳定性,将ZrO_2纤维引入到莫来石-SiC晶须复合材料体系中,在N2气氛中常压烧结制备莫来石-SiC晶须复合材料。结果表明,ZrO_2纤维可以促进了莫来石复合材料的烧结,提高复合材料的断裂韧性和抗热震稳定性。ZrO_2纤维的加入量为15wt.%时,材料的断裂韧性和抗热震稳定性到峰值,其断裂韧性为5.73 MPa·m~(1/2),抗热震次数达到47次。过量加入ZrO_2纤维导致其促烧结能力降低会对莫来石-SiC晶须复合材料的机械性能和抗热震稳定性产生不利影响。
In order to improve the mechanical property and the thermal shock resistance of the mullite composite, the ZrO_2 fiber was introduced into the system of the mullite-SiC whisker composite which was prepared with the method of pressureless sintering in nitrogen. The result shows that introduction of ZrO_2 fiber can promote the sintering of the mullite composite,and enhance the fracture toughness property and the thermal shock resistance of the mullite composite.When the addition of ZrO_2 fiber was 15 wt.%,the fracture toughness property of the composite that reached the highest,was 5.73 MPa·m~(1/2),and the thermal shock resistance of the composite that was maximum value,attained 47 times.The poor sintering resulted from the overmuch addition of ZrO_2 fiber has a negative performance impact of the mechanical property and the thermal shock resistance of the mullite-SiC whisker composite.
In order to improve the mechanical property and the thermal shock resistance of the mullite composite, the ZrO_2 fiber was introduced into the system of the mullite-SiC whisker composite which was prepared with the method of pressureless sintering in nitrogen. The result shows that introduction of ZrO_2 fiber can promote the sintering of the mullite composite,and enhance the fracture toughness property and the thermal shock resistance of the mullite composite.When the addition of ZrO_2 fiber was 15 wt.%,the fracture toughness property of the composite that reached the highest,was 5.73 MPa·m~(1/2),and the thermal shock resistance of the composite that was maximum value,attained 47 times.The poor sintering resulted from the overmuch addition of ZrO_2 fiber has a negative performance impact of the mechanical property and the thermal shock resistance of the mullite-SiC whisker composite.
引文
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[2]E Medvedovski.Alumina-mullite ceramics for structural applications[J].Ceramics International,2006,32(4):369-375.
[3]戴长虹,赵茹,孟永强,等.碳化硅纳米晶须的研究进展[J].中国陶瓷,2003,39(1):29-31.DAI C H,Zhao R,MENGY Q et al.China Ceramics,2003,39(1):29-31.
[4]宁叔帆,刘晓霞,马勇,等.Si C晶须制备方法及应用[J].西安石油大学学报,自然科学版,2004,19(1):66-69.NING S F,LIU X X,MA Y et al.Journal of Xi`An Shiyou University for Natural Science Edition,2004,19(1):66-69.
[5]Rojas P C,Piderit G J,Toro P.Development of open-pore silicon carbide foams[J].Key Engineering Materials,1997,132-136:1731-1734.
[6]Popovska N,Alkhateeb E,Froba A P et al.Thermal conductivity of porous Si C composite ceramics derived from paper precursor[J].Ceramics International,2010,36(7):2203-2207.
[7]石彪,朱明星,陈义,等.单晶硅衬底异质外延3C-Si C薄膜研究进展[J].硅酸盐通报,2011,30(5):1082-1088.SHI B,ZHU M X,CHRN Y et al.Journal of the Chinese Ceramic Society,2011,30(5):1082-1088
[8]周磊,王钢,顾士甲.石墨烯复合Si O2材料的制备及其性能研究[J].陶瓷学报,2017,38(1):41-46.ZHOU L,WANG G,GU SJ.Journal of the Ceramics,2017,38(1):41-46.
[9]张巍,戴立勇.氮化硅-莫来石复合材料的制备[J].中国陶瓷,2010,46(6):46-49.ZHANG W,DAI L Y.China Ceramics,2010,46(6):46-49.
[10]Kaya C,Butler E G,Selcuk A,et al.Mullite(Nextel?720)fibre-reinforced mullite matrix composites exhibiting favourable thermomechanical properties[J].Journal of the European Ceramic Society,2002,22(13):2333-2342.
[11]ZHANG X,XU L,DU S,et al.Thermal shock behavior of Si C-whisker-reinforced diboride ultrahigh-temperature ceramics[J].Scripta Materialia,2008,59(1):55-58.
[12]Tian J,Shohu K.Thermal shock behavior of Si C-whiskerreinforced diboride ultrahigh-temperature ceramics[J].Journal of Material Science[J],2004,39(11):3751-3755.
[13]李和祯,李志坚,罗旭东,等.La2O3对莫来石陶瓷微观组织结构的影响[J].人工晶体学报,2016,45(1):205-210.LI H Z,LI Z J,LUO X D et al.Journal of Synthetic Crystals,2016,45(1):205-210.
[14]赵冉,孙洪巍,刘慧娟,等.复合烧结助剂对Al2O3-Zr O2陶瓷相对密度的影响[J].硅酸盐通报,2011,30(2):272-277.ZHAO R,SUN H W,LIU H J et al.Journal of the Chinese Ceramic Society,2011,30(2):272-277.
[15]王健全,田欣利,张保国,等.基于激光切割的Si3N4陶瓷断裂韧性测试方法[J].硅酸盐通报,2013,32(1):103-107.WANG B Q,TIAN X L,ZHANG B G et al.Journal of the Chinese Ceramic Society,2013,32(1):103-107.
[16]L Lin,M Nygren,D Jiang,et al.Spark-plasma-sintering consolidation of Si C whisker reinforced mullite composites[J].Journal of American Ceramic Society[J],2004,1(87):42-46.
[17]王昕,于薛刚,单妍,等.纳米Zr O2与微米Al2O3复合陶瓷的断裂模式[J].材料研究学报,2007,21(5):482~486.WANG X,YU X G,SHAN Y et al.Chinese Journal of Materials Research,2007,21(5):482-486.
[18]Carl E Curtis.Development of zirconia resistant to thermal shock[J].Journal of the American Ceramic Society,2006,30(6):180-19.