Microstructure of Laser In-Situ Synthesized ZrB2-C Reinforced Cu Matrix Composite Coatings

被引：0
|
作者：
Lü X. [1 ]
Zhan Z. [1 ]
Cao H. [1 ]
机构：
[1] State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao
来源：
Xiyou Jinshu/Chinese Journal of Rare Metals | 2020年 / 44卷 / 01期
关键词：
Composite coating; In-situ synthesis; Laser cladding; Spherical graphite; ZrB[!sub]2[!/sub;
D O I：
10.13373/j.cnki.cjrm.XY18080012
中图分类号：
学科分类号：
摘要：
Al-ZrO2-B4C-Ni-Cu powder was used as the cladding powder. ZrB2 and graphite C reinforced Cu matrix composite coatings were fabricated on the surface of copper by laser cladding combined with in-situ synthesis reaction. The microstructure of the composite coatings, phase compositions, the structure of the in-situ synthesized phase were investigated by means of optical microscopy (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS) etc.; The microhardness of the composite coatings was measured by a Vickers hardness tester. And the growth process of the composite coating microstructure was analyzed. The results showed: aneedle-like ZrB2 ceramic phase and spherical graphite (with the Al2O3 core) were in-situ synthesized in the composite coating. Due to the rapid cooling in the melt, the dendritic crystal was formed by non-equilibrium solidification, and the ZrB2 ceramic phase was wrapped by the dendritic crystal. The ZrB2 ceramic, a fiber reinforced phase, hada superior bonding with the metal matrix that could improve the mechanical properties of composite coating effectively. The position near the surface of the composite coating had the highest microhardness, the microhardness inside the coating slowly decreased along the direction of depth, and rapidly dropped to the hardness value of the Cu matrix after through the interface. The mean microhardness of the composite coating reached 4800 MPa, which was about 7 times higher than that of the copper substrate. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.
引用
收藏
页码：34 / 40
页数：6
相关论文
共 19 条
  • [1] Ziemnicka-Sylwester M., The Cu matrix cermets remarkably strengthened by TiB<sub>2</sub> "in situ" synthesized via self-propagating high temperature synthesis, Materials & Design, 53, (2014)
  • [2] Xu J.Y., Zou B.L., Fan X.Z., Zhao S.M., Hui Y., Wang Y., Zhou X., Cai X.L., Tao S.Y., Ma H.M., Cao X.Q., Reactive plasma spraying synthesis and characterization of TiB<sub>2</sub>-TiC-Al<sub>2</sub>O<sub>3</sub>/Al composite coatings on a magnesium alloy, Journal of Alloys and Compounds, 596, (2014)
  • [3] Li M., Huang J., Zhu Y.Y., Li Z.G., Effect of heat input on the microstructure of in-situ synthesized TiN-TiB/Ti based composite coating by laser cladding, Surface and Coatings Technology, 206, 19-20, (2012)
  • [4] Lin Y.H., Lei Y.P., Fu H.G., Lin J., Mechanical properties and toughening mechanism of TiB<sub>2</sub>/NiTi reinforced titanium matrix composite coating by laser cladding, Materials & Design, 80, (2015)
  • [5] Tan H., Wang S., Cheng J., Zhou S.Y., Yu Y., Qiao Z.G., Yang J., Tribological properties of Al-20Si-5Fe-2Ni-Graphite solid-lubricating composites, Tribology International, 121, (2018)
  • [6] Su Y.F., Zhang Y.S., Song J.J., Hu L.T., Tribological behavior and lubrication mechanism of self-lubricating ceramic/metal composites: the effect of matrix type on the friction and wear properties, Wear, 372-373, (2017)
  • [7] Xu X., Mi G.Y., Chen L., Xiong L.D., Jiang P., Shao X.Y., Wang C.M., Research on microstructures and properties of Inconel 625 coatings obtained by laser cladding with wire, Journal of Alloys and Compounds, 715, (2017)
  • [8] Arias-Gonzalez F., Del Val J., Comesana R., Penide J., Lusquinos F., Quintero F., Riveiro A., Boutinguiza M., Pou J., Laser cladding of phosphor bronze, Surface and Coatings Technology, 313, (2017)
  • [9] Liu H.X., Zhang X.W., Jiang Y.H., Zhou R., Microstructure and high temperature oxidation resistance of in-situ synthesized TiN/Ti<sub>3</sub>Al intermetallic composite coatings on Ti<sub>6</sub>Al<sub>4</sub>V alloy by laser cladding process, Journal of Alloys and Compounds, 670, (2016)
  • [10] Guo Y.X., Liu Q.B., Zhou F., Microstructure and wear resistance of high-melting-point AlCrFeMoNbxTiW high-entropy alloy coating by laser cladding, Chinese Journal of Rare Metals, 41, 12, (2017)
12