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为研究基体热导率对超音速火焰(HVOF)喷涂Al-Cu-Cr准晶涂层相组成的影响规律,采用相同的热喷涂参数,分别在304不锈钢、45#钢、工业纯铝和紫铜基体表面制备涂层.X射线衍射分析结果表明:喷涂准晶粉末Al65Cu20Cr15中含有二十面体准晶相I-Al65Cu24Cr11和极少量具有单斜结构的晶体相-θAl13Cr2(即Al83Cu4Cr13);而超音速火焰喷涂形成涂层中除这两相外,还生成了一种新相,即具有体心立方结构的晶体相-αAl69Cu18Cr13,为I相的晶体类似相.晶体相θ和α与准晶相I之间对应衍射峰的强度比值θ/I和α/I随基体热导率的提高而增大.304不锈钢为基体的涂层中,准晶相I含量比紫铜为基体的涂层中的高,而晶体相θ和α的含量比后者低.
In order to study the effect of matrix thermal conductivity on the phase composition of Al-Cu-Cr quasicrystalline coating sprayed by HVOF, the same thermal spraying parameters were used, respectively in 304 stainless steel, 45 # steel, industrial pure aluminum and copper X-ray diffraction analysis results show that: the spray-quasicrystalline Al65Cu20Cr15 contains icosahedral quasicrystalline I-Al65Cu24Cr11 and a very small amount of monoclinic crystal phase-θAl13Cr2 (ie, Al83Cu4Cr13); and supersonic flame In addition to these two phases, a new phase was formed by spray coating, that is, a crystalline phase having a body-centered cubic structure-αAl69Cu18Cr13, which is a crystal-like phase of phase I. The phases θ and α and the phase I of the crystalline phase Between the corresponding diffraction peak intensity ratio θ / I and α / I with the substrate thermal conductivity increased.304 stainless steel substrate coating, the quasicrystal I content than the copper-based coating is high, While the content of theta and α in the crystal phase is lower than the latter.