CAJ | 학술논문

采用粉末冶金瞬时液相烧结法制备Al-Fe-Si/Al原位复合材料，利用XRD、SEM、EDS及电子万能压缩试验机研究了不同烧结温度对复合材料微观组织及力学特性的影响。结果表明：原位自生Al0.5FeSi0.5增强相晶粒随着烧结温度升高逐渐长大，由细针状向粒状、短棒状以及板条状转变，材料开口气孔率先降低后升高；随着烧结温度升高，维氏硬度与压缩强度呈先上升后下降的趋势，510℃时粒状、短棒状增强相弥散分布在基体上，硬度与压缩强度达到最大值，为283HV和293.4 MPa。烧结温度的升高增强了界面的结合强度，材料的界面和孔隙的综合作用决定了复合材料的性能。
채용분말야금순시액상소결법제비Al-Fe-Si/Al원위복합재료，이용XRD、SEM、EDS급전자만능압축시험궤연구료불동소결온도대복합재료미관조직급역학특성적영향。결과표명：원위자생Al0.5FeSi0.5증강상정립수착소결온도승고축점장대，유세침상향립상、단봉상이급판조상전변，재료개구기공솔선강저후승고；수착소결온도승고，유씨경도여압축강도정선상승후하강적추세，510℃시립상、단봉상증강상미산분포재기체상，경도여압축강도체도최대치，위283HV화293.4 MPa。소결온도적승고증강료계면적결합강도，재료적계면화공극적종합작용결정료복합재료적성능。
Al-Fe-Si/Al in-situ composite was prepared by transient liquid phase sintering method of powder metallurgy. The influence of sintering temperature on microstructure and mechanical property of Al-Fe-Si/Al in-situ composites was investigated by X-ray diffraction(XRD),scanning electron microscopy(SEM)and energy dispersive spectroscopy(EDS). The result shows that with the increase of sintering temperature,the grain size of in-situ synthesized Al0.5FeSi0.5 increases,the microstructure changes from fine needle-like to the shape of granular,short bar and lath,the open porosity decreases at first and then increases. With the sintering temperature increasing,the Vickers hardness and compressive strength have a trend of first increase and then decrease. The granular and short-bar reinforced phases get a diffuse distribution on the substrate,and the hardness and compressive strength reach the peak value of 283HV and 293.4 MPa at the sintering temperature of 510 ℃. The interfacial bonding strength enhances with sintering temperature increasing,the combined effect of material interface and pore determines the performance of the composite material.