采用爆炸喷涂制备添加BaF2/CaF2共晶的Cr3C2基金属陶瓷涂层,通过X射线衍射仪(XRD)、扫描电镜(SEM)及显微硬度仪等检测方法观测了喷涂粉形貌、相组成及涂层微观组织、硬度等性能,探讨了BaF2/CaF2共晶的加入方式及其含量对爆炸喷涂Cr3C2基金属陶瓷涂层性能的影响,结果显示:10%的BaF2/CaF2共晶与Cr3C2-25%NiCr粉体经高能球磨1 h,粉体粒度最小,尺寸均匀性最高.爆炸喷涂后涂层组织致密,孔隙率小于0.8%;共晶的加入,降低了涂层的显微硬度(Hv),且随加入量的增加,涂层硬度及孔隙率逐步降低;共晶与Nicr合金的预先球磨,有助于提高涂层均匀致密性和硬度,孔隙率为0.2%,显微硬度(Hv)为665.6.
参考文献
| [1] | 赵能伟,郑勇,刘林艳.Cr3C2基金属陶瓷高温抗氧化性能的研究[J].硬质合金,2008(02):67-72. |
| [2] | 徐强,张幸红,曲伟,韩杰才.金属陶瓷的研究进展[J].硬质合金,2002(04):221-225. |
| [3] | Subhash Kamal;R. Jayaganthan;S. Prakash .Hot corrosion behavior of detonation gun sprayed Cr_3C_2-NiCr coatings on Ni and Fe-based superalloys in Na_2SO_4-60 percent V_2O_5 environment at 900 deg C[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2008(1/2):358-372. |
| [4] | 颜练武,吴恩熙.超细Cr3C2粉末的制备[J].硬质合金,2006(01):11-14. |
| [5] | Subhash Kamal;R Jayaganthan;Satya Prakash .Evaluation of cyclic hot corrosinn behaviour of detonation gun sprayed Cr3C2-25%NiCr coatings on nickel-and iron-based superalloys[J].Surface and Coatings Technology,2009,203:1004-1013. |
| [6] | 许磊,张春华,张松,华伟刚,孙超,康煜平,才庆魁.爆炸喷涂研究的现状及趋势[J].金属热处理,2004(02):21-25. |
| [7] | 龙彦辉.爆炸喷涂工艺制备碳化铬涂层[J].表面技术,2002(02):18-19,31. |
| [8] | C DdlaCorte;J A Fellenstein;P A Benoy .Evaluation of Advanced Solid LubricantCoatings for Foil Air Bearings Operating at 25 and 500℃[NASA/TM1998-206619][R]. |
| [9] | C. Suryanarayana .Mechanical alloying and milling[J].Progress in materials science,2001(1/2):1-184. |
| [10] | 郭永锋,丁春华,张洪涛,杨志懋,丁秉钧.高能球磨制备PS304纳米复合粉[J].稀有金属材料与工程,2006(12):1995-1998. |
| [11] | C DellaCorte;V Lukaszewicz;M J Valco et al.Performance and Durability of High Temperature Foid Air Bearings for Oil-Free Turbomachinery[NASA/TM-2000-209187/REV1][R]. |
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