【摘要】 采用机械合金化、冷压和微波烧结法制备了Cu₂₀Fe₈₀合金,通过X射线和SEM扫描电镜分析Cu₂₀Fe₈₀合金组织和相组成,并测定合金的致密度和硬度,研究了制备过程中Cu₂₀Fe₈₀合金组织的演变规律。结果表明:Cu₂₀Fe₈₀合金粉体呈层片状,随球磨时间增加,合金粉体得到细化,机械合金化程度增强;Cu₂₀Fe₈₀合金粉体的冷压坯组织呈层片状,随冷压压力提高,合金压坯由疏松逐渐密实,致密程度逐渐提高,成形性提高;微波烧结后合金组织呈层片状,随冷压压力和球磨时间增加,晶界逐渐明显,孔隙减少,致密度增加,硬度提高,最佳球磨时间为4 h。更多还原

【Abstract】 The alloy Cu₂₀Fe₈₀ is prepared by mechanical alloying,cold pressing and microwave sintering. The microstructure and phase composition of the alloy are analyzed by XRD and SEM,and the density and hardness of the alloy are measured. The evolution rule is investigated for microstructure of the alloy during preparation process. The results show that the structure of powders of the alloy is lamellar which is refined and the mechanical alloying is enhanced with increasing ball milling time. The microstructure for cold pressed blank of powders of the alloy is lamellar which gradually become dense,the density is increased and formability is improved with the increase of cold compressive Pressure.The microstructure of the alloy is lamellar after microwave sintering,the voids are decreased,the grain boundaries are gradually obvious,the density is increased and the hardness is improved with the increase of cold compressive pressure and ball milling time,the best ball milling time is 4 h.更多还原