CAJ | 학술논문

用机械合金化法制取Mo-8%Cu（质量分数）纳米复合粉末,采用液相烧结和致密化后处理工艺制备了Mo-8%Cu（质量分数）合金。通过扫描电镜对Mo-Cu液相烧结和变形加工后合金显微组织进行了分析,研究了各种工艺参数对Mo-Cu合金致密性、拉伸强度、延伸率和晶粒尺寸的影响。结果表明,高能球磨的Mo-8%Cu（质量分数）纳米复合粉末坯体,经液相烧结后,其烧结态为Mo、Cu复合网状组织,可获得相对密度高达98.6%的Mo-Cu合金,再经静液挤压变形加工处理后,可获得全致密的Mo-8%Cu（质量分数）合金,在室温静液挤压40%形变率的条件下,拉伸强度可达到576MPa,延伸率5.8%。
용궤계합금화법제취Mo-8%Cu（질량분수）납미복합분말,채용액상소결화치밀화후처리공예제비료Mo-8%Cu（질량분수）합금。통과소묘전경대Mo-Cu액상소결화변형가공후합금현미조직진행료분석,연구료각충공예삼수대Mo-Cu합금치밀성、랍신강도、연신솔화정립척촌적영향。결과표명,고능구마적Mo-8%Cu（질량분수）납미복합분말배체,경액상소결후,기소결태위Mo、Cu복합망상조직,가획득상대밀도고체98.6%적Mo-Cu합금,재경정액제압변형가공처리후,가획득전치밀적Mo-8%Cu（질량분수）합금,재실온정액제압40%형변솔적조건하,랍신강도가체도576MPa,연신솔5.8%。
Mo-8wt%Cu nano powders were fabricated by mechanical alloying, and the dense alloys were obtained via the liquid-phase sintering and post-treatment process. The microstrueture of Mo-8wt%Cu alloy were investi- gated by scanning electron microscope （SEM）, and the effects of process parameters on the density, tensile strength, the elongation and grain size were studied. The results indicate that the relative density of alloy is 98.6% after sintering at 1250℃ for 30 min, and its microstructure is composite network. The full density of Mo-Cu alloy is achieved when specimens are treated through hydrostatic extrusion transformation processes. The tensile strength is 576MPa, and the elongation is 5.8% when hydrostatic extrusion transformation degree is 40%.