烧结助剂MgO和烧结温度对β-Sialon陶瓷的力学性能影响
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摘要
以α-Si3N4粉、α-Al2O3粉和Al N粉及烧结助剂MgO为原料,采用热压烧结的工艺制备了β-Sialon陶瓷材料,研究了烧结助剂MgO和烧结温度对sialon陶瓷力学性能和组织形貌的影响.结果表明,加入烧结助剂MgO提高了β-sialon陶瓷的致密度且降低了烧结温度,随着烧结温度的升高,β-sialon陶瓷抗弯强度、断裂韧性呈先增加后降低的变化规律,当烧结温度为1600℃时制备的β-sialon陶瓷材料结合紧密,抗弯强度以及断裂韧性达到最大,值分别为423 MPa、2.73 MPa·m1/2,材料的断裂方式主要是沿晶断裂.
β-Sialon ceramics were prepared by reactive hot pressing sintering method with α-Si3N4,α-Al2O3,and sintering additive MgO as raw materials. Effect of sintering additive MgO and the sintering temperature on mechanical property and morphology were systematically studied. The results indicate that the sintering additives MgO greatly improve β-Sialon ceramics density and reduce the sintering temperature. Along with the sintering temperature increasing,the bending strength and the fracture toughness of β-Sialon ceramics increased before they are lower. At the sintering temperature of 1 600 ℃,the preparation of β-Sialon ceramics obtained the highest bending strength and fracture toughness,the value( 423 MPa,2.73 MPa·m1 /2),combined closely. The principal fracture mode of composites is intergranular fracture.
β-Sialon ceramics were prepared by reactive hot pressing sintering method with α-Si3N4,α-Al2O3,and sintering additive MgO as raw materials. Effect of sintering additive MgO and the sintering temperature on mechanical property and morphology were systematically studied. The results indicate that the sintering additives MgO greatly improve β-Sialon ceramics density and reduce the sintering temperature. Along with the sintering temperature increasing,the bending strength and the fracture toughness of β-Sialon ceramics increased before they are lower. At the sintering temperature of 1 600 ℃,the preparation of β-Sialon ceramics obtained the highest bending strength and fracture toughness,the value( 423 MPa,2.73 MPa·m1 /2),combined closely. The principal fracture mode of composites is intergranular fracture.
引文
[1]JACK K H.Related Nitrogen Ceramics[J].Journal of Materials Science,1976,11(8):1135.
[2]王会阳等.氮化硅陶瓷的制备及性能研究进展[J].江苏陶瓷.,2011,44(6):4-6.
[3]王正军.氮化硅陶瓷的研究进展[J].材料科学与工艺.2009,17(2):155-158.
[4]FATIH C,ZAFER T,ANNAIK G.Pressureless Sintering ofβ-sialon Ceramic Compositions Using Fluorine and Oxide Additive System[J].Journal of the European Ceramic Society.2012,32:1337-1342.
[5]王佩玲,贾迎新,孙维莹.稀土元素对R-α-Sialon材料致密化和物相组成的影响[J].无机材料学报,2000,9(1):55-60
[6]俞泽民,孙永,吴叶伟.复合稀土掺杂对β-sialon陶瓷组织与力学性能影响[J],哈尔滨理工大学学报,2008,13(6):108-110
[7]ZHANG Y,CHENG Y B.Grain Boundary Devitrification of Ca-α-sialon Ceramics and Its Relation with the Fracture Toughness[J].Journal of Materials Science,2003,38:1359-1364.
[8]YOU ICH ZROU Kaga,UARK I.Jones,KIYOSHI Hirao,et al.Effect of the Amount of Excess Oxides on the Densification ofα-Sialon Fabricated Via a Reaction-bonding Process[J].Journal of Materials Science,2007,42:699-704.
[9]NAOTOH I,ROSAK I,AKIRAOKA D.Sintering of Si3N4with the Addition of Rare-Earth Oxides[J].Journal of the American Ceramic Society.1988,71(3):144-147.
[10]陈红光,孙维莹.稀土氧化物对β-Sialon陶瓷的致密化和力学性能的影响[J].无机材料学报,1998,13(1):33-37.
[11]鲁晓勇,张德.不同因素对Sialon陶瓷结构与性能的影响[J].矿产保护与利用,2005,1:21-24.
[12]王雪松,曹枫.β-sialon基复相耐火材料的高温使用性能研究[J].耐火材料,2007,41(1):37-40.
[13]王零森,张正富,樊毅,等.烧结助剂对Sialon常压烧结的影响[J].中国有色金属学报,2001,11(3):389-389.
[14]ARIAS A.Effect of Ce O2,Mg O and Y2O3additions on the sinterability of a milled Si3N4with 14.5wt%Si O2[J].Journal of Materials Science,1981,16:787-799.
[15]SUN X L,SUN K N,DU M,et al.Effect of Al2O3and Fe3Al on the phase formation and mechanical properties ofβ-sialon[J].Materials and Design,2012,39:373-378.
[16]杨海涛,徐润泽,黄培云.Mg O2,Ce O2烧结助剂对常压烧结氮化硅陶瓷致密化和性能的影响[J].中国有色金属学报,1996,6(3):91-95.
[17]LIZER M,TANCULA M,WODEK T,et al K.The effect of mechanical activation on the properties ofβ-sialon precursors[J].Journal of the European Ceramic Society,2008,28:279-88.
[18]DAVID Salamon.The Influence of La2O3and Nd2O3Addition on Aspect Ratio of Y-sialon Seeds.Journal of the American Ceramic Society,2005,77(7):3201-3204.
[2]王会阳等.氮化硅陶瓷的制备及性能研究进展[J].江苏陶瓷.,2011,44(6):4-6.
[3]王正军.氮化硅陶瓷的研究进展[J].材料科学与工艺.2009,17(2):155-158.
[4]FATIH C,ZAFER T,ANNAIK G.Pressureless Sintering ofβ-sialon Ceramic Compositions Using Fluorine and Oxide Additive System[J].Journal of the European Ceramic Society.2012,32:1337-1342.
[5]王佩玲,贾迎新,孙维莹.稀土元素对R-α-Sialon材料致密化和物相组成的影响[J].无机材料学报,2000,9(1):55-60
[6]俞泽民,孙永,吴叶伟.复合稀土掺杂对β-sialon陶瓷组织与力学性能影响[J],哈尔滨理工大学学报,2008,13(6):108-110
[7]ZHANG Y,CHENG Y B.Grain Boundary Devitrification of Ca-α-sialon Ceramics and Its Relation with the Fracture Toughness[J].Journal of Materials Science,2003,38:1359-1364.
[8]YOU ICH ZROU Kaga,UARK I.Jones,KIYOSHI Hirao,et al.Effect of the Amount of Excess Oxides on the Densification ofα-Sialon Fabricated Via a Reaction-bonding Process[J].Journal of Materials Science,2007,42:699-704.
[9]NAOTOH I,ROSAK I,AKIRAOKA D.Sintering of Si3N4with the Addition of Rare-Earth Oxides[J].Journal of the American Ceramic Society.1988,71(3):144-147.
[10]陈红光,孙维莹.稀土氧化物对β-Sialon陶瓷的致密化和力学性能的影响[J].无机材料学报,1998,13(1):33-37.
[11]鲁晓勇,张德.不同因素对Sialon陶瓷结构与性能的影响[J].矿产保护与利用,2005,1:21-24.
[12]王雪松,曹枫.β-sialon基复相耐火材料的高温使用性能研究[J].耐火材料,2007,41(1):37-40.
[13]王零森,张正富,樊毅,等.烧结助剂对Sialon常压烧结的影响[J].中国有色金属学报,2001,11(3):389-389.
[14]ARIAS A.Effect of Ce O2,Mg O and Y2O3additions on the sinterability of a milled Si3N4with 14.5wt%Si O2[J].Journal of Materials Science,1981,16:787-799.
[15]SUN X L,SUN K N,DU M,et al.Effect of Al2O3and Fe3Al on the phase formation and mechanical properties ofβ-sialon[J].Materials and Design,2012,39:373-378.
[16]杨海涛,徐润泽,黄培云.Mg O2,Ce O2烧结助剂对常压烧结氮化硅陶瓷致密化和性能的影响[J].中国有色金属学报,1996,6(3):91-95.
[17]LIZER M,TANCULA M,WODEK T,et al K.The effect of mechanical activation on the properties ofβ-sialon precursors[J].Journal of the European Ceramic Society,2008,28:279-88.
[18]DAVID Salamon.The Influence of La2O3and Nd2O3Addition on Aspect Ratio of Y-sialon Seeds.Journal of the American Ceramic Society,2005,77(7):3201-3204.