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首页> 外文期刊>Surface & Coatings Technology >The study of NiAl-TiB_2 coatings prepared by electro-thermal explosion ultrahigh speed spraying technology
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The study of NiAl-TiB_2 coatings prepared by electro-thermal explosion ultrahigh speed spraying technology

机译：电热爆炸超高速喷涂技术制备NiAl-TiB_2涂层的研究

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摘要

NiAl-TiB_2 composite coatings with 0, 10 and 20wt.% TiB_2 were synthesized on the Ni-based superalloy substrate using electro-thermal explosion ultrahigh speed spraying technology. The microstructure analysis shows that the coatings consist of submicron grains. The bond between coatings and substrate is metallic cohesion. TiB_2 as a powerful reinforcement is doped in NiAl for increasing its hardness. The isothermal oxidation test is carried out for the composite coatings at 1100°C in air. The result shows that the oxidation resistance of NiAl coating is higher than that of NiAl-10TiB_2 and NiAl-20TiB_2 coatings. The phases of oxides on the coatings during the process at high temperature have been analyzed by X-ray diffraction. The results show that Al_2O_3 and Cr_2O_3 coexistence on surface of NiAl coating, while Al_2O_3, Cr_2O_3, TiO_2 and a small amount of NiO form on surface of NiAl-10TiB_2 and NiAl-20TiB_2 coatings after oxidation for 4h.
机译：采用电热爆炸超高速喷涂技术在Ni基高温合金基底上合成了TiB_2含量为0、10和20wt。％的NiAl-TiB_2复合涂层。显微组织分析表明涂层由亚微米晶粒组成。涂层和基材之间的结合是金属内聚力。 TiB_2作为一种强大的增强剂被掺入NiA​​l中以增加其硬度。在空气中于1100°C下对复合涂层进行等温氧化测试。结果表明，NiAl涂层的抗氧化性高于NiAl-10TiB_2和NiAl-20TiB_2涂层。已经通过X射线衍射分析了在高温下的过程中涂层上的氧化物的相。结果表明，AlAl_2O_3和Cr_2O_3在NiAl涂层表面共存，而Al_2O_3，Cr_2O_3，TiO_2和少量NiO在NiAl-10TiB_2和NiAl-20TiB_2涂层氧化4h后形成。

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