摘要
Open-celled porous NiAl intermetallics with adjustable pore characteristics and mechanical properties were successfully prepared by using spherical carbamide as space-holders via combustion synthesis.Examinations of macroscopic and microscopic morphologies as well as the quasi-static compressive test for the resultant materials were carried out.Depending on the volume fraction and particle size of the carbamide,the porosity and pore size of the porous NiAl intermetallics can be controlled freely in a range of 57.57%-84.58% and 0.4-2.0 mm,respectively.Furthermore,quasi-static compressive tests indicate that the mechanical behavior of the present porous materials is in good agreement with the Gibson-Ashby model.
以尿素为造孔剂,利用燃烧合成技术成功制备孔洞结构和力学性能可控可调的开孔NiAl金属间化合物,并对材料的宏观和微观形貌、准静态压缩性能进行分析。通过调整尿素的体积分数和颗粒大小,多孔NiAl金属间化合物的孔隙率可控制在57.57%-84.58%,孔径大小可控制在0.4-2.0mm。准静态压缩实验表明,多孔NiAl金属间化合物的力学性能可用Gibson-Ashby模型来解释。
基金
Project (51072104) supported by the National Natural Science Foundation of China
Project (BS2010CL038) supported by the Research Award Fund for Outstanding Young and Middle-aged Scientists of Shandong Province,China
