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首页> 外文会议>2003 International Thermal Spray Conference Vol.1; May 5-8, 2003; Orlando, Florida, USA >Properties of Plasma and D-Gun Sprayed Metal-Matrix-Composite (MMC) Coatings Based on Ceramic Hard Particle Reinforced Fe-, Ni-aluminide Matrix
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Properties of Plasma and D-Gun Sprayed Metal-Matrix-Composite (MMC) Coatings Based on Ceramic Hard Particle Reinforced Fe-, Ni-aluminide Matrix

机译：基于陶瓷硬颗粒增强的Fe-，Al-铝化物基体的等离子和D-Gun喷涂金属基复合材料（MMC）涂层的性能

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摘要

Coatings of Metal-Matrix-Composite (MMC) with enhanced wear resistance were created by thermal spraying. The used powders composed of iron and nickel aluminides reinforced with alumina, Cr- and Ti-carbides were produced before by self-propagating high temperature synthesis (SHS). The fused and crushed composite powders were sprayed by atmosphere plasma spraying (APS) and gas detonation spraying (D-Gun). Spray powder and coating properties like morphology, structure, microhardness, porosity, bond strength, wear and corrosion resistance are examined using optical and scanning electron microscopy, XRD analysis, pin-on-disc (wear resistance). The produced MMC coatings are compared to commercially used wear resistant coatings, e.g. high velocity oxyfuel flame sprayed Cr_3C_2-NiCr. The properties of a special coating type depend on the used spraying method. Plasma sprayed MMCs show a slightly higher porosity than D-Gun sprayed coatings. The chemical composition of used powders has a big influence on the coating properties. Fe- and Ni-aluminide matrix coatings reinforced additionally with carbides, especially Cr_3C_2, show a better wear resistance compared to coatings containing just oxides as hard material.
机译：通过热喷涂产生具有增强的耐磨性的金属基复合材料（MMC）涂层。在通过自蔓延高温合成（SHS）之前，生产出了用铁和镍铝化物（由氧化铝，铬和钛碳化物增强）组成的废粉。通过大气等离子喷涂（APS）和气体爆轰喷涂（D-Gun）喷涂熔融和压碎的复合粉末。使用光学和扫描电子显微镜，X射线衍射（XRD）分析，针盘（耐磨性）检查喷涂粉末和涂层的性质，例如形态，结构，显微硬度，孔隙率，粘结强度，耐磨性和耐腐蚀性。将生产的MMC涂层与商业上使用的耐磨涂层例如高速含氧燃料火焰喷涂Cr_3C_2-NiCr。特殊涂层类型的特性取决于所使用的喷涂方法。等离子喷涂的MMC比D-Gun喷涂的涂层具有更高的孔隙率。用过的粉末的化学组成对涂层性能有很大的影响。与仅包含氧化物作为硬质材料的涂层相比，用碳化物（尤其是Cr_3C_2）额外增强的Fe和Ni铝化物基体涂层具有更好的耐磨性。

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