爆炸成型法制备碳化钽陶瓷
Preparation of Tantalum Carbide Ceramics by Explosion Forming Technology
摘 要
为提高碳化钽陶瓷的性能,采用微米碳化钽粉为原料,填充进双层钢管容器内,埋入铵油炸药,通过爆炸成型法制备碳化钽陶瓷,并对其组织与性能进行了分析.结果表明:爆炸成型后试样下部区域硬度可达14.5 GPa,但存在裂纹,中部区域硬度为4.8 MPa;成型后碳化钽晶格残余应变为2.4×10-3,爆炸冲击波在粉体颗粒中储备的内能为0.46 J·g-1,额外的内能和颗粒内部的位错群使得爆炸成型后的碳化钽更容易进行低温烧结,烧结后中部区域硬度提高到11 GPa.
陶瓷
爆炸成型
tantalum carbide
ceramic
explosive forming
Abstract
In order to improve mechanical properties of tantalum carbide (TaC) ceramics,TaC powders with nanometer size which were used as raw materials were packed in double-tube steel vessels and subjected to ammonium nitrate fuel oil(ANFO) explosive,then TaC ceramics were prepared by explosion forming technology.The microstructure and properties of the ceramics were analyzed.The results show that after forming,the hardness of 14.5 GPa could be obtained at the lower part of the sample with cracks,and 4.8 MPa in the central region.The lattice residual strain in TaC introduced by the explosion was 2.4×10-3.The explosion shock wave stored 0.46 J·g-1 internal energy inside the powders.The extra internal energy and the dislocation group in the particles made it possible for the shocked material to be sintered at lower temperatures.The hardness of the sintered sample in the central region could improve to 11 GPa.
中图分类号 TF124
所属栏目 新材料 新工艺
基金项目 教育部留学回国人员科研启动基金资助项目
收稿日期 2009/7/25
修改稿日期 2010/5/5
网络出版日期
作者单位点击查看
备注徐磊(1975-),男,陕西西安人,副教授,博士.
引用该论文: XU Lei. Preparation of Tantalum Carbide Ceramics by Explosion Forming Technology[J]. Materials for mechancial engineering, 2010, 34(9): 57～59
徐磊. 爆炸成型法制备碳化钽陶瓷[J]. 机械工程材料, 2010, 34(9): 57～59
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【3】OYAMA S T.Chemistry of transition metal carbides and nitrides[M].New York:Chapman & Hall,1996:29-30.
【4】佘振辉.碳化钽的加入方式对合金结构和性能的影响研究[J].硬质合金,1996,13(1):9-14.
【5】KIM C,GRUMMON D S,GOTTSTEIN G.Plastic flow and dislocation structures in tantalum carbide:Deformation at low and intermediate homologous temperatures [J].Acta Metallurgica et Materialia,1994,42(7):2291-2301.
【6】曾玉林,熊翔,李国栋,等.TaC陶瓷的强化烧结[J].粉末冶金材料科学与工程,2007,12(2):106-111.
【7】钟盛文,焦永斌,叶雪均,等.预热粉体爆炸烧结单相纳米氧化铝陶瓷的研究[J].无机材料学报,2001,16(3):572-575.
【8】MEYERS M,BENSON D J,OLEVSKY E A.Shock consolidation:microstructurally-based analysis and computational modeling[J].Acta Materialia,1999,47(7):2089-2108.
【9】ELLIOTT J,KELLY A,WINDLE A.Recursive packing of dense particle mixtures[J].Journal of Materials Science Letters,2002,21(16):1249-51.
【10】MEYERS M A.Dynamic behavior of materials[M].New York:John Wiley & Sons,Inc.,1994:52-54.
【11】WU Y,MIAO W,ZHOU H,et al.Characterization of shock waves treated aluminum nitride powder and its potential for low-temperature sintering[J].Materials Chemistry & Physics,2000,62(1):91-94.
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