稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2010年
2期
329-332
,共4页
姜龙涛%陈国钦%修子扬%范瑞君%武高辉%赫晓东
薑龍濤%陳國欽%脩子颺%範瑞君%武高輝%赫曉東
강룡도%진국흠%수자양%범서군%무고휘%혁효동
复合材料%TiB_2颗粒%力学性能%高强塑性
複閤材料%TiB_2顆粒%力學性能%高彊塑性
복합재료%TiB_2과립%역학성능%고강소성
composites%TiB_2 particles%mechanical properties%high strength-plasticity
采用TiB_2颗粒与铝粉混配的方法,获得利于成形的预制体,采用压力浸渗法制备体积分数为20%的TiB_(2P)/6061Al复合材料,并采用10:1的挤压比对复合材料进行热挤压.利用扫描电镜(SEM)、透射电镜(TEM)和万能电子拉伸机对热挤压前后复合材料的微观组织及力学性能进行研究,发现经过该种方法制备的复合材料经热挤压后具有良好的室温拉伸力学性能,抗拉强度为447.5 MPa,弹性模量为121.8 GPa,延伸率可达7.95 %,显示出良好的强塑性配合,分析其强塑性来源于增强体与基体之间的良好界面结合、晶粒细化强化和沉淀强化.
採用TiB_2顆粒與鋁粉混配的方法,穫得利于成形的預製體,採用壓力浸滲法製備體積分數為20%的TiB_(2P)/6061Al複閤材料,併採用10:1的擠壓比對複閤材料進行熱擠壓.利用掃描電鏡(SEM)、透射電鏡(TEM)和萬能電子拉伸機對熱擠壓前後複閤材料的微觀組織及力學性能進行研究,髮現經過該種方法製備的複閤材料經熱擠壓後具有良好的室溫拉伸力學性能,抗拉彊度為447.5 MPa,彈性模量為121.8 GPa,延伸率可達7.95 %,顯示齣良好的彊塑性配閤,分析其彊塑性來源于增彊體與基體之間的良好界麵結閤、晶粒細化彊化和沉澱彊化.
채용TiB_2과립여려분혼배적방법,획득리우성형적예제체,채용압력침삼법제비체적분수위20%적TiB_(2P)/6061Al복합재료,병채용10:1적제압비대복합재료진행열제압.이용소묘전경(SEM)、투사전경(TEM)화만능전자랍신궤대열제압전후복합재료적미관조직급역학성능진행연구,발현경과해충방법제비적복합재료경열제압후구유량호적실온랍신역학성능,항랍강도위447.5 MPa,탄성모량위121.8 GPa,연신솔가체7.95 %,현시출량호적강소성배합,분석기강소성래원우증강체여기체지간적량호계면결합、정립세화강화화침정강화.
Based on the easily-formed preform made of the mixture of TiB_2 particles and aluminum powder, 20% TiB_(2P)/6061Al composites (volume fraction) were fabricated by pressure infiltration method;subsequently, the composites were hot extruded with 10:1 extrusion ratio. The microstructures and mechanical properties of the composites before and after hot extrusion were studied with SEM, TEM and a tensile machine. Results show that the composites after hot extrusion exhibit better tensile strength, such as the tensile strength of 447.5 MPa, elastic modulus of 121.8 GPa and large elongation of 7.95 %. The high strength-plasticity for the composites is attributed to the interfacial bonding strength and grain refining strengthening and precipitation strengthening.
