纳米SiC晶须增强Ti(C,N)基金属陶瓷的显微组织与力学性能
Microstructure and Mechanical Properties of Nano-SiC Whisker Reinforced Ti(C,N)-Based Cermets
摘 要
采用真空烧结法制备了纳米SiC晶须增强Ti(C,N)基金属陶瓷复合材料,用XRD、FESEM、EDS、万能试验机及维氏硬度仪等手段研究了纳米SiC晶须对复合材料显微组织和抗弯强度及断裂韧度的影响.结果表明:复合材料的显微组织具有典型的“芯-壳”结构,主要由黑色的硬质核心相,灰色的环形相,灰白色的粘结相以及部分分布于外环形相/粘结相界面、部分弥散分布于粘结相中的白色增强相组成;随着纳米SiC晶须添加量的增加,粘结相的体积分数减小,增强相的体积分数增大;与未添加晶须的金属陶瓷相比,复合材料的抗弯强度和断裂韧度均有显著提高,当纳米SiC晶须的体积分数为7.5%时,复合材料的力学性能最佳,抗弯强度为2 346 MPa,断裂韧度为16.82 MPa·m1/2.
纳米SiC晶须
显微组织
力学性能
Ti(C,N)-based cermets
nano-SiC whisker
microstructure
mechanical property
Abstract
The nano-SiC whisker reinforced Ti(C,N)-based cermets composite was fabricated with vacuum sintering technology.The effect of nano-SiC whisker on the microstructure,transverse rupture strength (TRS) and fracture toughness (KIC) was studied by XRD,FESEM with EDS,universal testing machine and Vickers hardness tester.The results show that the microstructure exhibited the classical “core-rim” morphology composed of black core phase,gray surrounding phase,grayish-white binder phase and white reinforced-phase which was partly distributed on the rim phase/binder phase interface and partly diffusely distributed in the binder phase.With the increase of amount of nano-SiC whisker addition ,the volume fraction of binder phase decreased while the volume fraction of reinforced phase increased.The TRS and KIC of the composite were increased obviously respectively,comparing to Ti(C,N)-based cermet.When the nano-SiC whisker content was up to 7.5%,the best mechanical properties with the TRS of 2 346 MPa and the KIC of 16.82 MPa·m1/2 were obtained.
中图分类号 TG113.254
所属栏目 新材料 新工艺
基金项目 国家自然科学基金重点基金资助项目(50634060);国家自然科学基金资助项目(50074014)
收稿日期 2008/11/12
修改稿日期 2009/8/20
网络出版日期
作者单位点击查看
备注瞿峻(1982-),男,湖北英山人,博士研究生.
引用该论文: QU Jun,XIONG Wei-hao,KE Yang-lin,LIU Wen-jun,YE Da-meng,YAO Zhen-hua. Microstructure and Mechanical Properties of Nano-SiC Whisker Reinforced Ti(C,N)-Based Cermets[J]. Materials for mechancial engineering, 2009, 33(12): 62～65
瞿峻,熊惟皓,柯阳林,刘文俊,叶大萌,姚振华. 纳米SiC晶须增强Ti(C,N)基金属陶瓷的显微组织与力学性能[J]. 机械工程材料, 2009, 33(12): 62～65
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参考文献
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【22】SHETTY D K,WRIGHT I G,MINCER P N,et al.Indentation fracture of WC-Co cermets[J].Journal of Materials Science,1985,20(5):1873-1882.
【2】VIATTE T,BOLOGNINI S,GUTARD T,et al.Investigation into the potential of a composite combining toughness and plastic deformation resistance[J].International Journal of Refractory Metals and Hard Materials,1999,17(1/3):79-89.
【3】RAHIMI D V,RAHMANI M,FAGHIHI S M,et al.Microstructure and cutting performance investigation of Ti(C,N)-based cermets containing various types of secondary carbides[J].International Journal of Machine Tools and Manufacture,2007,47(5):768-772.
【4】KANG Y,LEE G H,KANG S.Growth of ultrafine Ti(CN) particles in Ti(CN)-Ni cermets[J].Scripta Materialia,2007,56(2):133-136.
【5】AHN S Y,KANG S.Effect of WC particle size on microstructure and rim composition in the Ti(C0.7N0.3)-WC-Ni system[J].Scripta Materialia,2006,55(11):1015-1018.
【6】向阳开,徐智谋.Ti(C,N)w/Ti(C,N)基金属陶瓷的组织和力学性能的研究[J].硬质合金,2006,23(3):129-133.
【7】刘文俊,郑勇,熊惟皓.Ti(C,N)金属陶瓷中纳米粉含量对组织和性能的影响[J].粉末冶金技术,2005,23(5):334-338.
【8】晋勇,汤小文,周剑,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】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):25-31.
【10】BALDACIM S A,SANTOS C,SILVA O M M,et al.Ceramics composites Si3N4-SiCw containing rare earth concentrate (CRE) as sintering aids[J].Materials Science and Engineering A,2004,367(1/2):312-316.
【11】刘宁,崔崑,胡镇华.SiC晶须对金属陶瓷抗弯强度和断裂韧性的影响[J].稀有金属材料与工程,1996,25(5):12-15.
【12】丁燕鸿,刘建文.SiC晶须增韧Ti(C,N)基金属陶瓷复合材料的研究[J].粉末冶金技术,2007,25(4):257-260.
【13】LIM D C,AHN H S,CHOI D J,et al.The field emission properties of silicon carbide whiskers grown by CVD[J].Surface and Coatings Technology,2003,168(1):37-42.
【14】LEE Y J,HWANG S M,CHOI D J,et al.The microstructural effect of chemically vapor infiltrated SiC whiskered thin film on the green body of SiC/C composites[J].Thin Solid Films,2002,420/421:354-359.
【15】BALDACIM S A,SANTOS C,SILVA O M M,et al.Mechanical properties evaluation of hot-pressed Si3N4-SiCw composites[J].International Journal of Refractory Metals and Hard Materials,2003,21(5/6):233-239.
【16】彭晓峰,黄校先,张玉峰.碳化硅晶须补强氧化铝复合材料的制备及其力学性能[J].无机材料学报,1998,13(4):469-476.
【17】AL-DHEYLAN K A.The low velocity impact loading of Al2O3/SiC whisker reinforced ceramic composite[J].Journal of Materials Processing Technology,2004,155/156:1986-1994.
【18】DENG J X,LIU L L,LIU J H,et al.Failure mechanisms of TiB2 particle and SiC whisker reinforced Al2O3 ceramic cutt-ing tools when machining nickel-based alloys[J].International Journal of Machine Tools and Manufacture,2005,45(12/13):1393-1401.
【19】缪世群,葛存旺.SiC晶须的含量对ZTA陶瓷基复合材料抗热震性能的影响[J].扬州大学学报:自然科学版,2002,5(1):40-43.
【20】缪世群,佘正国,葛存旺.SiC晶须的分散与涂覆工艺的研究[J].江苏理工大学学报:自然科学版,2000,21(2):52-56.
【21】罗伍文,黄勇.用于补强陶瓷基复合材料的SiC晶须分散工艺研究[J].硅酸盐通报,1990,9(2):9-13.
【22】SHETTY D K,WRIGHT I G,MINCER P N,et al.Indentation fracture of WC-Co cermets[J].Journal of Materials Science,1985,20(5):1873-1882.
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