以Al-TiB2复合粉体为强化层原料(其中铝为粘结剂),采用Nd:YAG激光在镁钆系镁合金表面进行激光熔覆强化处理,考察了TiB2含量对强化层组织、耐磨性及其与基体相容性的影响.结果表明:强化层中铝元素与基体中的钆、钇等元素发生了原位反应,生成了高温硬质相Al2Gd和Al2Y等金属间化合物,且引入的强化相TiB2未发生分解,与原位合成的金属间化合物及基体相容性良好,但分布特点和结构差异显著；当复合粉体中TiB2质量分数低于70％时,强化层组织细小均匀；强化层显微硬度随着TiB2含量的增加而增大,比基体硬度提高4～6倍,耐磨性能得到显著改善.
参考文献
| [1] | Srivatsan, T.S.;Godbole, C.;Paramsothy, M.;Gupta, M. .Influence of nano-sized carbon nanotube reinforcements on tensile deformation, cyclic fatigue, and final fracture behavior of a magnesium alloy[J].Journal of Materials Science,2012(8):3621-3638. |
| [2] | 张雄,董选普,陈东风.镁合金表面铝合金化层组织及性能研究[J].功能材料,2011(05):928-932. |
| [3] | 叶宏,王宾,龙刚,邓代玉.AZ31镁合金表面Al合金化层的制备与性能研究[J].表面技术,2010(01):20-22. |
| [4] | 陈长军,常庆明,张敏,王茂才.ZM5镁合金表面激光Al合金化行为的研究[J].应用激光,2007(04):261-268. |
| [5] | Hazra, M;Mondal, AK;Kumar, S;Blawert, C;Dahotre, NB .Laser surface cladding of MRI 153M magnesium alloy with (Al+Al2O3)[J].Surface & Coatings Technology,2009(16):2292-2299. |
| [6] | 陈长军,张敏,常庆明,张诗昌,马洪岩.镁合金表面激光熔覆纳米三氧化二铝[J].中国激光,2008(11):1752-1755. |
| [7] | 刘帅,殷锦捷,张娈,刘忆.激光合金化对AZ91D镁合金力学性能的影响[J].热加工工艺,2009(02):35-37. |
| [8] | J. Dutta Majumdar;I. Manna .Mechanical properties of a laser-surface-alloyed magnesium-based alloy (AZ91) with nickel[J].Scripta materialia,2010(8):579-581. |
| [9] | 李达,钱鸣,金昌,李慧.AZ91D镁合金Al-Si粉末激光合金化及腐蚀性能[J].中国激光,2008(09):1395-1400. |
| [10] | J. Dutta Majumdar;T. Maiwald;R. Galun;B. L. Mordike;I. Manna .Laser surface alloying of an Mg alloy with Al+Mn to improve corrosion resistance[J].Lasers in engineering,2002(3):147-169. |
| [11] | Baoshuai Du;Zengda Zou;Xinhong Wang;Shiyao Qu .Laser cladding of in situ TiB_2/Fe composite coating on steel[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2008(20):6489-6494. |
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