Ni基合金粉末及其非晶涂层的制备与表征
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摘要
为解决非晶粉末价格昂贵、成型困难等问题,采用真空气雾化法制备了Ni FeCrMoNbBSi合金粉末,利用火焰喷涂焰流温度高、冷凝速度快有利于形成非晶相等特点,经火焰喷涂后制备了镍基非晶涂层。通过XRD、SEM、EDS、TEM等对粉末和涂层的相组织结构、表面形貌和微观特征进行了表征。结果表明:Ni FeCrMoNbBSi合金粉末形貌为球形或近球形,主要由晶体相FeNi3和Ni CrFe固溶体组成,非晶含量较少。制备的Ni基非晶涂层组织结构致密,主要由非晶相和Cr2Ni3金属间化合物组成,非晶含量可达70%(体积分数)。
To solve the problems of high price and difficult form of amorphous powders,the Ni Fe Cr Mo Nb BSi alloy powders were prepared by vacuum atomization,and the nickel-based amorphous coating was fabricated by flame spraying,due to the high temperature of flame and fast condensation of flame spraying. The phase composition,morphology and microstructure of both the powders and the coatings were investigated by XRD,SEM,EDS and TEM,respectively. Results showed that the Ni Fe Cr Mo Nb BSi alloy powders were mainly spherical or near-spherical,which were mainly composed of Fe Ni3 crystal,Ni Cr Fe solid solution,and little amorphous components. The nickel-based amorphous coating with dense structure was composed of amorphous phase and Cr2 Ni3 intermetallic compound,and the amorphous content reached 70%( volume fraction).
To solve the problems of high price and difficult form of amorphous powders,the Ni Fe Cr Mo Nb BSi alloy powders were prepared by vacuum atomization,and the nickel-based amorphous coating was fabricated by flame spraying,due to the high temperature of flame and fast condensation of flame spraying. The phase composition,morphology and microstructure of both the powders and the coatings were investigated by XRD,SEM,EDS and TEM,respectively. Results showed that the Ni Fe Cr Mo Nb BSi alloy powders were mainly spherical or near-spherical,which were mainly composed of Fe Ni3 crystal,Ni Cr Fe solid solution,and little amorphous components. The nickel-based amorphous coating with dense structure was composed of amorphous phase and Cr2 Ni3 intermetallic compound,and the amorphous content reached 70%( volume fraction).
引文
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[3] VOYER J. Wear-resistant amorphous iron-based flamesprayed coatings[J]. Journal of Thermal Spray Technology,2010,19(5):1 013-1 023.
[4] HENAO J,CONCUSTELL A,CANO I G,et al. Novel Albased metallic glass coatings by cold gas spray[J]. Material and Design,2016,94:253-261.
[5] SCHENG J B,WANG Z H,XU B S. Wear and corrosion behaviors of Fe Cr BSi Nb W amorphous nanocrystalline coating prepared by arc spraying process[J]. Journal of Thermal Spray Technology,2012,21(5):1 025-1 031.
[6]胡壮麒,宋启洪,张海峰,等.亚稳态金属材料[M].北京:科学出版社,2006:10-15.
[7]王华仁. HVOF喷涂镍基非晶/微晶合金的显微组织和腐蚀性能[J].国外金属热处理,2002,23(2):21-25.
[8] WANG A P,ZHANG T,WANG J Q. Formation and Properties of Ni-Based Amorphous Metallic Coating Produced by HVAF Thermal Spraying[J]. Materials Transactions,2005,46(5):1 010-1 015.
[9] MOVAHEDI B,ENAYATI M H,WONG C C. Structural and thermal behavior of Fe-Cr-Mo-P-B-C-Si amorphous and nanocrystalline HVOF coatings[J]. Journal of Thermal Spray Technology,2010,19(5):1 093-1 099.
[10]吴玉萍,林萍华,王泽华,等. HVOF喷涂Fe-Cr基涂层中非晶与纳米晶形成的研究[J].材料热处理学报,2006,27(2):15-22.
[11] VERDON C,KARIMI A,MARTIN L. A study of high velocity oxy-fuel thermally sprayed tungsten carbide based coatings. Part 1:Microstructures[J]. Materials Science and Engineering(A),1998,246:11-24.
[12] SHEN B L,INOUE A. Glass Transition Behavior and Mechanical Properties of Ni-Si-B-Based Glassy Alloys[J].Materials Transactions,2003,44(7):1 425-1 428.
[13] INOUE A. Stabilization of metallic supercooled liquid and bulk amorphous alloys[J]. Acta materialia,2000,48(1):279-306.
[14]陈欣,欧阳鸿武,黄誓成,等.紧耦合气雾化制备Al基非晶合金粉末[J].北京科技大学学报,2008,30(1):35-40.
[15]胡壮麒,张海峰.块状非晶合金及其复合材料研究进展[J].金属学报,2010,46(11):1 391-1 421.
[16] LU Z P,LIU C T. A new glass-forming ability criterion for bulk metallic glasses[J]. Acta Materialia, 2002, 50:3 501-3 512.
[17]谢明,刘建良,邓忠民,等.粉末冶金快速凝固技术与材料[J].云南冶金,2000,29(3):26-32.
[18] ZHENG B L,LIN Y J,ZHOU Y Z,et al.Gas atomization of amorphous aluminum powder:part II. experimental investigation[J]. Metallurgical and Materials Transactions B,2009,40B:995-1 004.