增强材料原子比对Fe-Ti-C/ZL108复合材料的影响

Effect of Reinforcement Atomic Ratio on Fe-Ti-C/ZL108 Composite

为了探索Fe:Ti:C原子比对Fe-Ti-C/ZL108复合材料的影响,采用SEM观察复合材料的组织形貌,用EDS作元素分析,用XRD作物相分析,并测试了复合材料的硬度、抗拉强度和抗压强度。结果表明,FeTi-C/ZL108复合材料的增强相形状较复杂,大体分为3类:1.团絮状;2.条状;3.骨化石状。Ti会促进增强相轮廓向曲线或弧形转变,Fe会促进增强相的轮廓向直线或折线方向转变,C既能促进骨化石状的增强相形成,又能促进增强相轮廓向直线或折线转变。增强相的外形轮廓越接近球形,粒径越小,随着体积分数增加其承载能力增强。Ti原子比例较高时,其力学性能最好,硬度相对于ZL108提高了47.1%,抗拉强度提高了40.4%,抗压强度提高了39.8%,Fe次之,C最低。

In order to explore the effect of Fe:Ti:C atomic ratios on Fe-Ti-C/ZL108 composites, the microstructure of the composites was observed with scanning electron microscope(SEM), energy dispersive spectrometer(EDS) was used to conduct element analysis, X-ray diffraction(XRD) was used for phase analysis, and the hardness, tensile strength and compressive strength of the composites were tested. The results show that the reinforcing phase shape of the Fe-Ti-C/ZL108 composite is more complex, it could be roughly divided into three categories: 1. flocculent;2. strip-shaped;3. bone fossil-shaped. Ti promotes the transformation of the enhanced phase profile to a curve or an arc, and Fe promotes the transformation of the enhanced phase profile to a straight line or a polyline, and C promotes the formation of a fossil-like reinforcing phase and the transformation of the enhanced phase profile to a straight line or a polyline. The closer the profile of the reinforcing phase is to the spherical shape, the smaller the particle size is, and its carrying capacity increases as the volume fraction increases. When the proportion of Ti atoms is high, its mechanical properties are the best.The hardness HRB is increased by 47.1% compared to ZL108. The tensile strength Rm is increased by 40.4%, and the compressive strength σbc is increased by 39.8%. The Fe atom comes next, and the C atom is the lowest.