退火对镍钴合金镀层结构及力学性能的影响
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摘要
利用扫描电子显微镜、X射线衍射仪、显微硬度计和纳米压痕仪等研究了退火温度对镍钴合金镀层结构及性能的影响。结果表明:镍钴合金镀层呈(111)择优取向;随着退火温度升高,镀层衍射峰逐渐锐化,晶粒长大;镀层残余应力、硬度及弹性模量均下降,在300~400℃之间下降幅度最大,硬度降幅达到28%,弹性模量降幅达到22.4%。退火后,镀层纳米压痕最大深度和卸载后深度均变大,镀层抗塑性变形能力降低。
Effects of annealing temperature on microstructure and properties of Ni-Co alloy coating were investigated by means of scanning electron microscope,X-ray diffractometer,microhardness tester and nanoindentation. The results show that the Ni-Co alloy coating presents( 111) preferred orientation. With the increase of annealing temperature,the diffraction peaks gradually sharp,the grains grow up,and the residual stress,hardness and elastic modulus are decrease. The maximum decrease of hardness and elastic modulus are 28% and 22. 4% at the temperature range of 300-400 ℃,respectively. After annealing,both the maximum depth of the nano indentation and the depth after unloading become larger,which means that the plastic deformation ability of the coating decreases.
Effects of annealing temperature on microstructure and properties of Ni-Co alloy coating were investigated by means of scanning electron microscope,X-ray diffractometer,microhardness tester and nanoindentation. The results show that the Ni-Co alloy coating presents( 111) preferred orientation. With the increase of annealing temperature,the diffraction peaks gradually sharp,the grains grow up,and the residual stress,hardness and elastic modulus are decrease. The maximum decrease of hardness and elastic modulus are 28% and 22. 4% at the temperature range of 300-400 ℃,respectively. After annealing,both the maximum depth of the nano indentation and the depth after unloading become larger,which means that the plastic deformation ability of the coating decreases.
引文
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[2]Gomez E,Ramirez J,Valles E.Electrodeposition of Co-Ni alloys[J].Journal of Applied Electrochemistry,1998,28(3):71-76.
[3]Wu Z W,Lei Y P,Wang Y,et al.Effect of cobalt content on microstructure and property of electroplated nickel-cobalt alloy coatings[J].Materialwissenschaft Und Werkstofftechnik,2013,44(7):593-600.
[4]裴和中,李雪,黄攀,等.镍钴合金电铸精密薄壁件的研究现状及展望[J].热加工工艺,2013,42(21):13-15.Pei Hezhong,Li Xue,Huang Pan,et al.Study reality and prospect of Ni-Co alloy electroforming for precision thin-walled parts[J].Hot Working Technology,2013,42(21):13-15.
[5]郑炜铭,戴品强,唐电.低温退火对电刷镀纳米晶Ni-Co合金镀层性能的影响[J].中国表面工程,2010,23(5):68-72.Zheng Weiming,Dai Pinqiang,Tang Dian.The effects of low temperature annealing on the property of brush plated nanocrystalline NiCo alloy coating[J].China Surface Engineering,2010,23(5):68-72.
[6]Li H Q,Ebrahimi F.An investigation of thermal stability and microhardness of electrodeposited nanocrystalline nickel-21%iron alloys[J].Acta Materialia,2003,51(13):3905-3913.
[7]林绿波,林兰芳,戴品强,等.电沉积纳米晶Ni-Co-Fe合金镀层的热稳定性[J].中国有色金属报,2011,21(5):1087-1092.Lin Lyubo,Lin Lanfang,Dai Pinqiang,et al.Thermal stability of electrodeposition nanocrystalline Ni-Co-Fe alloy coatings[J].The Chinese Journal of Nonferrous Metals,2011,21(5):1087-1092.
[8]陈大川,赵仲勋,曾鹏,等.电刷镀高锡铜锡合金镀层的热处理及摩擦性能研究[J].电镀于涂饰,2015,34(24):1385-1390.Chen Dachuan,Zhao Zhongxun,Zeng Peng,et al.Study on heat treatment and tribological properties of electro-brush plated high-tin copper-tin alloy coating[J].Electroplating and Finishing,2015,34(24):1385-1390.
[9]许伟长,林芬,陈颖,等.氨基磺酸镍体系电沉积纳米镍的力学性能及热稳定性研究[J].福州大学学报(自然科学版),2008,36(3):387-392.Xu Weichang,Lin Fen,Chen Ying,et al.Investigation on mechanical properties and themal stability in an electrodeposited nanocrystalline Ni prepared by nickel sulfamate system electrolyte[J].Joumal of Fuzhou University(Natural Science),2008,36(3):387-392.
[10]Wang Weihua.The elastic properties,elastic models and elastic perspectives of metallic glasses[J].Progress in Materials Science,2012,57(3):