大尺寸12%(体积)SiCp/2024Al复合材料制备工艺研究  

Researches on Preparation of Large-Scale 12 vol.% SiCp/2024 Al Composite Materials

作　　者：毕婷婷[1,2] 朱丽娟[1] 刘越[2] 

机构地区：[1]沈阳大学机械工程学院,沈阳110004 [2]东北大学材料与冶金学院,沈阳110819

出　　处：《金属功能材料》2012年第4期35-38,共4页Metallic Functional Materials

摘　　要：采用元素粉末作为12%(体积)SiCp/2024Al复合材料的原料,研究了冷压后经真空烧结获得预制坯,再对坯料进行热变形的制备工艺,通过金相观察、力学性能测试等手段研究了12%(体积)SiCp/2024Al复合材料在热变形前后的显微组织及力学性能。结果表明:经过热变形的12%(体积)SiCp/2024Al复合材料组织的均匀性得到了明显改善,显微孔洞和SiC颗粒团聚现象明显消除。复合材料的抗拉强度、屈服强度和延伸率较变形前有普遍提高。热变形改善了SiCp颗粒分布均匀性,致密度和硬度也进一步提高。We prepared 12vol. % SiCp/2024A1 composites from elemental powders, researched on one of the prepa- ration technology of this composites,which is get the blocking by vacuum sintering, followed by the thermal deform- ation. The microstrueture and mechanical properties of 12 vol. SiCp/2024 A1 composite materials are researched through the analysis of metallographic observation and mechanical properties test. The result shows that： after ther- mal deformation, the microstructure of 12 vol. SiCp/2024 A1 composite has been improved, microscopic holes and SiC particles reunion phenomenon are eliminated obviously. Tensile strength, yield strength and elongation are im- proved after thermal deformation,it improved density and hardness too.

关 键 词：真空烧结 热变形 SICP/AL复合材料 微观组织 致密度 

分 类 号：TB331[一般工业技术—材料科学与工程]