激光熔覆TiC-Cr_7C_3-CNTs增强涂层制备及其显微组织
|
摘要
采用激光熔覆技术在304不锈钢表面合成了TiC-Cr7C3-CNTs增强涂层。利用X射线衍射仪测试了涂层相组成、电子扫描电镜和透射电镜观察了涂层的显微组织,采用硬度计测试了涂层的硬度。结果表明,涂层中TiC和Cr7C3颗粒分布较均匀,同时还有CNTs。在涂层顶部还有易碎的TiO2和TiC组成的陶瓷层。涂层无裂缝、无孔洞且与基体结合良好。涂层的平均硬度高达365HV0.2,远高于基本的平均硬度235HV0.2。
TiC-Cr7C3-CNTs reinforced coating on 304 stainless steels surface was fabricated by laser cladding. The phase and microstructure of the coatings were investigated by means of X-ray diffraction,scanning electron microscopy and transmission electron microscopy,respectively,the microhardness was also measured using microhardness test. The results show that the TiC and Cr7C3 particles are uniformly dispersed and CNTs has been observed in the coating. The brittle ceramic coating,consisting of TiO2 and TiC,is observed on the top of the coating. The coating exhibited few defects and excellent bonding with the steel substrate. The hardness of the coating is up to 365 HV0. 2,significantly higher than that of the substrate of 235 HV0. 2.
TiC-Cr7C3-CNTs reinforced coating on 304 stainless steels surface was fabricated by laser cladding. The phase and microstructure of the coatings were investigated by means of X-ray diffraction,scanning electron microscopy and transmission electron microscopy,respectively,the microhardness was also measured using microhardness test. The results show that the TiC and Cr7C3 particles are uniformly dispersed and CNTs has been observed in the coating. The brittle ceramic coating,consisting of TiO2 and TiC,is observed on the top of the coating. The coating exhibited few defects and excellent bonding with the steel substrate. The hardness of the coating is up to 365 HV0. 2,significantly higher than that of the substrate of 235 HV0. 2.
引文
[1]Yu M F,Lourie O,Dyer M J,et al.Strength and breaking mechanism of multiwalled carbon nanotubes under tensile load[J].Science,2000,287:637-640.
[2]刘兴辉,朱长纯,田昌会,等.大面积碳纳米管薄膜的低温制备与表征[J].功能材料,2004,35(5):590-592.LIU Xing-hui,ZHU Chang-chun,TIAN Chang-hui,et al.Low temperature fabrication and characterization Of large area carbon nanotubes film[J].Journal of Functional Materials,2004,35(5):590-592.
[3]陈卫祥,涂江平,王浪云,等.铝合金上电沉积Ni-P-CNTs复合镀层及其摩擦性能研究[J].浙江大学:工学版,2008,42(11):2033-2036.CHEN Wei-xiang,TU Jiang-ping,WANG Lang-yun,et al.Friction and wear behaviors of electrodeposited Ni-P-CNTs composite coatings on Al-alloy substrate[J].Journal of Zhejiang University:Engineering Science,2008,42(11):2033-2036.
[4]周笑薇,晁明举,王文丽.碳纳米管对Ni60激光熔覆层的耐蚀性影响[J].激光杂志,2007,28(2):75-76.ZHOU Xiao-wei,CHAO Ming-ju,WANG Wen-li.Effect of carbon nanotubes on the corrosion resistance of laserclad Ni60 alloy coatings[J].Laser Journal,2007,28(2):75-76.
[5]Gu Z J,Yang Y C,Li K Y,et al.Aligned carbon nanotube-reinforced silicon carbide composites produced by chemical vapor infiltration[J].Carbon,2011,49(7):2475-2482.
[6]李刚,李志刚,徐先锋.定向碳纳米管薄膜的制备及可控浸润性[J].材料热处理学报,2013,34(7):12-15.LI Gang,LI Zhi-gang,XU Xian-feng.Controllable wettability and preparation of aligned carbon nanotubes film[J].Transactions of Materials and Heat Treatment,2013,34(7):12-15.
[7]Ghorbani H,Rashidi A M,Rastegari S,et al.Mass production of multi-wall carbon nanotubes by metal dusting process with high yield[J].Materials Research Bulletin,2011,46(5):716-721.
[8]Li W G,Zhang G J,Li J.Cladding of WC-Cr3C2cermet coating by laser controlled reactive synthesis[J].Key Engineering Materials,2008,368/372(2):1872-1877.
[9]Wu Q L,Zhang J Q,Sun Y S.Oxidation behavior of Ti C particle-reinforced 304 stainless steel[J].Corrosion Science,2010,52(4):1003-1010.
[2]刘兴辉,朱长纯,田昌会,等.大面积碳纳米管薄膜的低温制备与表征[J].功能材料,2004,35(5):590-592.LIU Xing-hui,ZHU Chang-chun,TIAN Chang-hui,et al.Low temperature fabrication and characterization Of large area carbon nanotubes film[J].Journal of Functional Materials,2004,35(5):590-592.
[3]陈卫祥,涂江平,王浪云,等.铝合金上电沉积Ni-P-CNTs复合镀层及其摩擦性能研究[J].浙江大学:工学版,2008,42(11):2033-2036.CHEN Wei-xiang,TU Jiang-ping,WANG Lang-yun,et al.Friction and wear behaviors of electrodeposited Ni-P-CNTs composite coatings on Al-alloy substrate[J].Journal of Zhejiang University:Engineering Science,2008,42(11):2033-2036.
[4]周笑薇,晁明举,王文丽.碳纳米管对Ni60激光熔覆层的耐蚀性影响[J].激光杂志,2007,28(2):75-76.ZHOU Xiao-wei,CHAO Ming-ju,WANG Wen-li.Effect of carbon nanotubes on the corrosion resistance of laserclad Ni60 alloy coatings[J].Laser Journal,2007,28(2):75-76.
[5]Gu Z J,Yang Y C,Li K Y,et al.Aligned carbon nanotube-reinforced silicon carbide composites produced by chemical vapor infiltration[J].Carbon,2011,49(7):2475-2482.
[6]李刚,李志刚,徐先锋.定向碳纳米管薄膜的制备及可控浸润性[J].材料热处理学报,2013,34(7):12-15.LI Gang,LI Zhi-gang,XU Xian-feng.Controllable wettability and preparation of aligned carbon nanotubes film[J].Transactions of Materials and Heat Treatment,2013,34(7):12-15.
[7]Ghorbani H,Rashidi A M,Rastegari S,et al.Mass production of multi-wall carbon nanotubes by metal dusting process with high yield[J].Materials Research Bulletin,2011,46(5):716-721.
[8]Li W G,Zhang G J,Li J.Cladding of WC-Cr3C2cermet coating by laser controlled reactive synthesis[J].Key Engineering Materials,2008,368/372(2):1872-1877.
[9]Wu Q L,Zhang J Q,Sun Y S.Oxidation behavior of Ti C particle-reinforced 304 stainless steel[J].Corrosion Science,2010,52(4):1003-1010.