热压烧结Al_2O_3/Al-steel Mesh-Al层状复合材料的制备和性能(英文)  

Preparation and Properties of Hot-pressed Al_2O_3/Al-steel Mesh-Al Laminated Composites

作　　者：白明敏[1] 李伟信[1,2] 李艳辉[1] 赵威[1] 饶平根[1] 

机构地区：[1]华南理工大学材料学院,广州510640 [2]景德镇学院,景德镇333000

出　　处：《无机材料学报》2014年第12期1339-1344,共6页Journal of Inorganic Materials

基　　金：Science and Technology Program of Guangdong Province of China(2012B091000107)

摘　　要：在580℃和1.5 MPa的条件下用热压烧结的方法制备出了一系列Al2O3/Al-steel mesh-Al层状复合材料,该复合材料是由两层铝箔和一层丝网构成的"sandwich"结构,Al-steel mesh-Al为中间夹层。结果显示,Al2O3/Al的界面粘结紧密并且没有反应发生。在Al/steel的界面处出现了金属间化合物,该化合物改善了Al与丝网之间的结合性能。相比于纯Al2O3,Al2O3/Al-steel mesh-Al层状复合材料强度差别不大,但具有更高的断裂韧性和断裂功。裂纹扩展分析认为层状复合材料断裂韧性和断裂功的提高得益于裂纹钝化和捕获,界面分离,裂纹桥接和Al-steel mesh-Al的塑性变形等机制。落锤冲击结果表明,Al2O3/Al-steel mesh-Al层状复合材料具有较好的抗冲击性能。Al2O3/Al-steel mesh-Al laminated composites with ＂sandwich＂ Al-steel mesh-Al layer as interlayer, which was consisted of two Al foils and one steel mesh, were prepared by vacuum hot pressing at 580℃ and 1.5 MPa. The results indicate that the interface of Al2O3/Al is bonded tightly and no reaction is observed. Intermetallic compound （IMC） is detected in Al/steel interface which improves the connection conditions between the steel and Al. The lami- nated composites have much higher fracture toughness, work-of-fracture than that of the Al2O3 monolith, as well as having a close strength toAl2O3. Crack blunting and arresting, crack bridging, interface debonding, and ductile defor- mation of ＂sandwich＂ Al-steel mesh-Al layer are the main reasons for improving the toughness and work-of-fracture of laminated composites. Low-velocity impact results suggest that the Al2O3/Al-steel mesh-Al laminated composites have good impact resistance.

关 键 词：氧化铝 Al-丝网 热压烧结 层状复合材料 力学性能 落锤冲击 

分 类 号：TQ174[化学工程—陶瓷工业]