CAJ | 학술논문

采用气压浸渗法制备SiC/A356/FeNi50复合材料。SiC/A356/FeNi50的界面由FeNi50反应层、Al反应层和 Al 合金基体组成。(Fe,Ni)4(Al,Si)13和(Fe,Ni)2(Al,Si)5作为主要的界面反应产物分别存在于 FeNi50反应层和Al反应层中。讨论了不同浸渗温度和保温时间下的材料弯曲行为。结果表明：670°C时的抗弯强度是所有温度下的最好的，与Al合金的(223 MPa)接近，并达到了SiC/A356抗弯强度的46%。由于界面中脆性相的存在而导致抗弯强度的下降。合适的保温时间能使预制体温度更加均匀，减少空洞的形成，这对提高复合材料的抗弯强度具有重要意义。
채용기압침삼법제비SiC/A356/FeNi50복합재료。SiC/A356/FeNi50적계면유FeNi50반응층、Al반응층화 Al 합금기체조성。(Fe,Ni)4(Al,Si)13화(Fe,Ni)2(Al,Si)5작위주요적계면반응산물분별존재우 FeNi50반응층화Al반응층중。토론료불동침삼온도화보온시간하적재료만곡행위。결과표명：670°C시적항만강도시소유온도하적최호적，여Al합금적(223 MPa)접근，병체도료SiC/A356항만강도적46%。유우계면중취성상적존재이도치항만강도적하강。합괄적보온시간능사예제체온도경가균균，감소공동적형성，저대제고복합재료적항만강도구유중요의의。
The SiC/A356/FeNi50 composite was fabricated by gas pressure infiltration. The interfacial region of the SiC/A356/FeNi50 composite consisted of FeNi50 reaction layer, Al reaction layer and Al alloy matrix. The main intermetallic compounds were (Fe,Ni)4(Al,Si)13 and (Fe,Ni)2(Al,Si)5 at the Al reaction layer and FeNi50 reaction layer, respectively. The bending behavior versus different infiltration temperatures and holding times was also investigated. The bending strength at 670 °C was the highest and close to the bending strength of Al alloy (223 MPa), and 46%of SiC/A356. The brittle intermetallic compounds existing at the interface induced the decreasing of the bending strength. The pores were reduced by adequate heating time due to the homogeneous temperature of preform, which was beneficial to improve the bending strength of the composite.