造孔剂(NH4)2CO3含量对FeAl多孔材料性能的影响  

Effect of pore-forming agent (NH_4)_2CO_3 content on properties of porous FeAl materials

作　　者：王杰丰 高海燕[2] 江垚[2] 杨军胜[2] 高麟 贺跃辉[1,2] 

机构地区：[1]中南大学,冶金与环境学院,长沙410083 [2]中南大学,粉末冶金国家重点实验室,长沙410083 [3]成都易态科技有限公司,成都611731

出　　处：《粉末冶金材料科学与工程》2014年第4期654-658,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金项目(51071178);国家科技支撑计划项目(2012BAC02B05);湖南省自然科学基金(12JJ4044)

摘　　要：以Fe、Al元素粉末为原料,通过添加造孔剂(NH4)2CO3,利用偏扩散/反应合成,制备具有可控孔结构特征、高孔隙率的FeAl多孔材料;采用XRD、SEM、OM及孔结构与力学性能检测等测试手段研究造孔剂(NH4)2CO3添加量对FeAl多孔材料的孔结构与力学性能的影响。结果表明,随造孔剂添加量增加,FeAl多孔材料的孔隙率升高,当造孔剂质量分数为15%时,孔隙率高达60%;力学性能随孔隙率增加而下降,抗弯强度与孔隙率呈指数递减关系;并得出了孔隙率与抗拉强度关系的定量方程σb=165(1-p)2.4。Porous FeAl materials with high porosity and controllable pore characteristics were successfully fabricated by reactive synthesis method using pore-forming agent（NH4）2CO3. The effect of the（NH4）2CO3 content on the pore structure and mechanical properties of porous FeAl materials was systemically studied by the XRD、SEM and OM as well as pore structure and mechanical property testing ways. The results show that the porosity of fabricated porous materials increases with increasing（NH4）2CO3 content, the porosity reaches as high as nearly 60% when content of.（NH4）2CO3 is 15%; The flexural strength decreases exponentially with increasing the porosity; The equation of the relationship between porosity and tensile strength was verified as, 4.2）1（165 P

关 键 词：造孔剂 孔隙率 FeAl多孔材料 

分 类 号：TG146[一般工业技术—材料科学与工程]