放电等离子烧结纳米复合Ti(C,N)基金属陶瓷
Fabrication of Nano-composite Ti(C,N)-based Cermets by Spark Plasma Sintering
摘 要
采用放电等离子技术(SPS)烧结制备出纳米复合Ti(C,N)基金属陶瓷材料.用光学显微镜、扫描电镜和能谱仪等对烧结体的孔隙率、微观组织和断口形貌等进行了观察,并对不同条件下材料的力学性能进行了对比分析.结果表明：直接升温到1250℃保温8min可获得较好的力学性能；在显微结构中,除了黑芯/白环的结构外,还存在着白芯/黑环结构；孔洞和大颗粒硬质相为主要的断裂源,断裂方式以沿晶断裂为主,同时存在着解理断裂和穿晶断裂.
纳米复合
Ti(C,N)基金属陶瓷
显微结构
spark plasma sintering
nano-composite
Ti(C,N)-based cermet
microstructure
Abstract
OM,SEM,EDX and other techniques were used to analyze the porosity,microstructure and fractography of nano-composite Ti(C,N)-based cermets produced by spark plasma sintering(SPS).The mechanical properties of Ti(C,N)-based cermets produced in different conditions were discussed.At 1250℃ for 8min by elevating directly,fairly good mechanical performance could be obtained.Except the microstructure of black core/white rim,white core/black rim was also presented,which resulted from the existence of nano-powders which changed the evolution of microstructure.The fracture mainly originated from cavities and the intergranular fracture was the leading fracture mode,besides the cleavage fracture and transgranular fracture.
中图分类号 TB333
所属栏目
基金项目 国家自然科学基金资助项目(50074014)； 湖北省自然科学基金资助项目(2003ABA092)
收稿日期 2005/1/24
修改稿日期 2005/3/24
网络出版日期
作者单位点击查看
备注梁在国(1981-),男,广西桂林人,硕士研究生.
引用该论文: LIANG Zai-guo,XIONG Wei-hao,LEI Yan,HU Yao-bo,FAN Chou,WANG Zhi-wu. Fabrication of Nano-composite Ti(C,N)-based Cermets by Spark Plasma Sintering[J]. Materials for mechancial engineering, 2006, 30(3): 64～67
梁在国,熊惟皓,雷燕,胡耀波,范畴,王志武. 放电等离子烧结纳米复合Ti(C,N)基金属陶瓷[J]. 机械工程材料, 2006, 30(3): 64～67
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参考文献
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【3】许育东,刘宁,曾庆梅,等.纳米TiN改性金属陶瓷刀具的磨损性能研究[J].机械工程材料,2002,26(6):28-31.
【4】Feng P,Xiong W,Yu L,et al.Phase evolution and microstructure characteristics of ultrafine Ti(C,N)-based cermets by spark plasma sintering[J].International Journal of Refractory Metals & Hard Materials,2004,22:133-138.
【5】高濂,洪金生.放电等离子超烧结氧化物陶瓷[J].无机材料学报,1998,13(1):18-22.
【6】胡耀波,李 鹏,熊惟皓.BP神经网络的实现及应用[J].机械工程材料,2002,26(6):16-18.
【7】雷燕,熊惟皓,梁在国.放电等离子烧结在金属-陶瓷复合材料制备中的应用[J].机械工程材料,2004,28(6):17-19.
【8】晋勇,薛屺,汤小文,等.纳米金属陶瓷材料的微波烧结工艺研究[J].机械工程材料,2004,28(12):49-51.
【9】夏阳华,丰平,胡耀波,等.放电等离子烧结制备Ti(C,N)基金属陶瓷[J].机械工程材料,2004,28(5):29-31.
【10】Ahn S Y,Kang S.Formation of core/rim structures in Ti(C,N)-WC-Ni cermets via a dissolution and precipitation process[J].J Am Ceram Soc,2000,83(6):1489-1494.
【11】Ehira M,Egami A.Mechanical properties and microstructure of submicron cermets[J].Int J of Refractory Metals & Hard Materials,1995,13:313-319.
【12】郑勇,游敏,刘文俊,等.原始粉末尺寸对Ti(C,N)基金属陶瓷烧结特性和组织结构的影响[J].粉末冶金技术,2003,21(3):195-200.
【13】余立新,李晨辉,熊惟皓,等.Ti(C,N)基金属陶瓷在烧结-热等静压条件下的组织、性能研究[J].硬质合金,2001,18(2):69-73.
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