Al_2O_3纤维对SiO_2基陶瓷型芯的烧缩阻滞
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摘要
向SiO_2基体粉料中添加Al_2O_3纤维,采用热压注法制备Al_2O_3/SiO_2陶瓷型芯。分析Al_2O_3纤维含量对陶瓷型芯性能的影响。研究结果表明:Al_2O_3纤维含量对Al_2O_3/SiO_2陶瓷型芯的线收缩率、体积密度和抗弯强度均有较大的影响。当Al_2O_3纤维含量大于1wt%时,Al_2O_3/SiO_2陶瓷型芯的线收缩率大幅度降低,稳定在0.335%左右,体积密度随之降低,稳定在1.790g·cm-3左右;当Al_2O_3纤维含量为1wt%时,陶瓷型芯抗弯强度达最大值20.48 MPa。分析了Al_2O_3纤维对Al_2O_3/SiO_2陶瓷型芯烧结收缩的阻滞作用机制。
Al_2O_3 fiber was added into the SiO_2 matrix powder,and the Al_2O_3/SiO_2 ceramic core was prepared by hot-pressing method.The effects of Al_2O_3 fiber content on the properties of Al_2O_3/SiO_2 ceramic core were analyzed.The results indicate that the mass fraction of Al_2O_3 fiber has a great influence on the linear shrinkage,bulk density and flexural strength of Al_2O_3 fiber/SiO_2 ceramic core.When the content of Al_2O_3 fiber is more than 1 wt%,the linear shrinkage of the Al_2O_3/SiO_2 ceramic core decreases to 0.335%,the volume density of the core decreases,and it is stable at 1.790 g·cm-3;When the Al_2O_3 fiber mass fraction is 1 wt%,the flexural strength of the core reaches the maximum value of 20.48 MPa.The mechanism of Al_2O_3 fiber on the sintering shrinkage of Al_2O_3/SiO_2 ceramic core was analyzed.
Al_2O_3 fiber was added into the SiO_2 matrix powder,and the Al_2O_3/SiO_2 ceramic core was prepared by hot-pressing method.The effects of Al_2O_3 fiber content on the properties of Al_2O_3/SiO_2 ceramic core were analyzed.The results indicate that the mass fraction of Al_2O_3 fiber has a great influence on the linear shrinkage,bulk density and flexural strength of Al_2O_3 fiber/SiO_2 ceramic core.When the content of Al_2O_3 fiber is more than 1 wt%,the linear shrinkage of the Al_2O_3/SiO_2 ceramic core decreases to 0.335%,the volume density of the core decreases,and it is stable at 1.790 g·cm-3;When the Al_2O_3 fiber mass fraction is 1 wt%,the flexural strength of the core reaches the maximum value of 20.48 MPa.The mechanism of Al_2O_3 fiber on the sintering shrinkage of Al_2O_3/SiO_2 ceramic core was analyzed.
引文
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[21]国防科学技术工业委员会.熔模铸造陶瓷型芯性能试验方法第2部分:烧成收缩率的测定:HB 5353.2—2004[S].北京:中国航空综合技术研究所,2004.State Administration of Science,Technology,and Industry for National Defense.Test method for properties of investment casting ceramic core-Part 2:Determination of sintered shrinkage:HB 5353.2—2004[S].Beijing:AVIC China Aero-Polytechnology Establishvient,2004(in Chinese).
[2]顾国红,曹腊梅.熔模铸造空心叶片用陶瓷型芯的发展[J].铸造技术,2002,23(2):80-83.GU G H,CAO L M.Development of ceramic cores for investment casting hollow blades[J].Foundry Technology,2002,23(2):80-83(in Chinese).
[3]熊建平,赵国庆,戴斌煜,等.陶瓷型芯在航空发动机叶片生产中的应用与发展[J].江西科学报,2007,25(6):801-806.XIONG J P,ZHAO G Q,DAI B Y,et al.Application and development of ceramic core in production of aero engine blade[J].Jiangxi Science,2007,25(6):801-806(in Chinese).
[4]张强.硅基陶瓷型芯性能对空心叶片不露芯率的影响[J].铸造技术,2004,25(8):586-587.ZHANG Q.Effect of silica-based ceramic core on non corebasseted rate of hollow blade[J].Foundry Technology,2004,25(8):586-587(in Chinese).
[5]王毅强.硅基陶瓷型芯制备与性能分析[D].西安:西北工业大学,2005.WANG Y Q.Preparation and properties of silica-based ceramic core[D].Xi’an:Northwestern Polytechnical University,2005(in Chinese).
[6]张伟,张玉军,陈坤,等.浅谈熔模铸造陶瓷型芯研究现状[J].陶瓷,2007(12):8-11.ZHANG W,ZHANG Y J,CHEN K,et al.Renew of lost pattern ceramic core by precision casting[J].Ceramics,2007(12):8-11(in Chinese).
[7]WERESZCZAK A A,BREDER K,FERBER M K,et al.Dimensional changes and creep of silica core ceramics used in investment casting of superalloys[J].Journal of Materials Science,2002,37(19):4235-4245.
[8]李倩,马德文,蒋殷红,等.影响定向空心叶片陶瓷型芯性能的一个重要因素:方石英含量的控制[J].材料工程,1994(5):18-19.LI Q,MA D W,JIANG Y H,et al.Effect of cristobalite content on the properties of ceramic core in making directionally solidified hollow blade[J].Materials Engineering,1994(5):18-19(in Chinese).
[9]吴新正,邓湘云,李建保,等.α-石英方石英转变的研究[J].材料工程,2009(s2):67-69.WU X Z,DENG X Y,LI J B,et al.The critobalite transition ofα-quartz[J].Journal of Materials Engineering,2009(s2):67-69(in Chinese).
[10]任刚伟,常亮,卫晓辉,等.硅砖中方石英的晶体结构与形貌[J].硅酸盐学报,2006,34(1):123-126.REN G W,CHANG L,WEI X H,et al.Ctystal structure and morphology ofαcristobalite in silica bricks[J].Journal of the Chinese Ceramic Society,2006,34(1):123-126(in Chinese).
[11]赵效忠.陶瓷型芯的制备与使用[M].北京:科学出版社,2013.ZHAO X Z.Preparation and application of ceramic core[M].Beijing:Science Press,2013(in Chinese).
[12]贺靠团,马德文,蒋殷鸿,等.空心叶片复杂硅基陶瓷型芯的粉料粒度[J].材料工程,1992(1):34-35.HE K T,MA D W,JIANG Y H,et al.Particle size of hollow blade complex silicon-based ceramic core[J].Materials Engineering,1992(1):34-35(in Chinese).
[13]覃业霞,张睿,杜爱兵,等.粉料季度对氧化铝基陶瓷型芯材料性能的影响[J].稀有金属材料与工程,2007,36(S1):711-713.QIN Y X,ZHANG R,DU A B,et al.Effect of quarterly powder on properties of alumina-based ceramic core materials[J].Rare Metal Materials and Engineering,2007,36(S1):711-713(in Chinese).
[14]杨来侠,段志军,吴海华.氧化铝陶瓷型芯凝胶成型因素研究[J].特种铸造及有色合金,2010,30(2):149-152.YANG L X,DUAN Z J,WU H H.Study on the forming factors of alumina ceramic core gel[J].Special Casting&Nonferrous Alloys,2010,30(2):149-152(in Chinese).
[15]覃业霞,潘伟.蓝晶石对氧化铝基复合陶瓷型芯性能的影响[J].稀有金属材料与工程,2008,38(s2):223-225.QIN Y X,PAN W.Effects of kyanite on the properties of alumina-based composite ceramic core[J].Rare Metal Materials and Engineering,2008,38(s2):223-225(in Chinese).
[16]芦刚,纪超众,严青松,等.陶瓷纤维长度对复合精铸型壳抗弯强度与透气性的影响及增强行为[J].复合材料学报,2017,34(4):865-872.LU G,JI C Z,YAN Q S,et al.Effects and enhanced behavior of ceramic fiber length on bending strength and breathability of composite shell for investment casting[J].Acta Meterial Compositae Sinica,2017,34(4):865-872(in Chinese).
[17]孙爱芳,刘敏珊,董其伍.短切纤维增强复合材料拉伸强度的预测[J].材料研究学报,2008,22(3):333-336.SUN A F,LIU M S,DONG Q W.Prediction of tensile strength for short-fiber-reinforced composites[J].Chinese Joural of Materials Research,2008,22(3):333-336(in Chinese).
[18]TUAN K T,DONG J K.High strain rate effects on direct tensile behavior of high performance fiber reinforced cementitious composites[J].Cement and Concrete Composites,2014,45:186-200.
[19]陈冰.聚合物和纤维增强硅溶胶—国外精铸技术进展述评(4)[J].特种铸造及有色合金,2005,25(4):231-233.CHEN B.Review of progress in investment casting technology at abroad PartⅢ:Polymer and fibre reinforced sol silicate[J].Special Casting and Nonferrous Alloys,2005,25(4):231-233(in Chinese).
[20]王婕丽,林文松,姜自旺,等.纤维结构钼铜复合材料的制备及组织性能[J].中国有色金属学报,2014,24(1):174-178.WANG J L,LIN W S,JIANG Z W,et al.Fabrication and structure properties of fiber-structured Mo-Cu composites[J].The Chinese Journal of Nonferrous Metals,2014,24(1):174-178(in Chinese).
[21]国防科学技术工业委员会.熔模铸造陶瓷型芯性能试验方法第2部分:烧成收缩率的测定:HB 5353.2—2004[S].北京:中国航空综合技术研究所,2004.State Administration of Science,Technology,and Industry for National Defense.Test method for properties of investment casting ceramic core-Part 2:Determination of sintered shrinkage:HB 5353.2—2004[S].Beijing:AVIC China Aero-Polytechnology Establishvient,2004(in Chinese).