【摘要】：AlCoCrFeNi高熵合金因其優(yōu)異的綜合力學(xué)性能而有望成為新一代高溫結(jié)構(gòu)材料,但對(duì)其高溫摩擦磨損性能的研究還較為少見.本文中應(yīng)用放電等離子燒結(jié)(SPS)技術(shù)制備了AlCoCrFeNi高熵合金,研究了其顯微組織和力學(xué)性能,系統(tǒng)地考察了其在室溫至800℃時(shí)的摩擦磨損性能.結(jié)果表明:應(yīng)用SPS技術(shù)制備的AlCoCrFeNi高熵合金主要由FCC相、無序BCC相和少量有序BCC相組成;呈網(wǎng)格狀分布的FCC相使高熵合金具有良好的塑性和韌性,而呈等軸狀分布的BCC相賦予了高熵合金優(yōu)異的強(qiáng)度;高熵合金室溫至800℃時(shí)的摩擦系數(shù)在0.43~0.51之間,磨損率低于10 5mm3/(N·m).室溫至中溫階段主要為磨粒磨損,中溫至高溫階段的磨損機(jī)制為磨粒磨損、黏著磨損和塑性變形綜合作用.高溫下高熵合金表面形成了一層主要由為Al2O3和Cr2O3組成的氧化物膜,在一定程度上起到抗磨作用.
[Abstract]:AlCoCrFeNi high entropy alloy is expected to become a new generation of high temperature structural materials because of its excellent comprehensive mechanical properties, but the study of high temperature friction and wear properties is still rare. In this paper, AlCoCrFeNi high entropy alloy was prepared by spark plasma sintering (Spark plasma sintering (SPS). Its microstructure and mechanical properties were studied, and its friction and wear properties from room temperature to 800 鈩，

本文編號(hào)：2501390