摘要
用粉末烧结法制备了孔结构为球形中空孔和线型中空孔的镍基多孔高温合金材料。对试样进行显微组织观察和力学性能测试。结果表明:制备的多孔高温合金材料的孔隙分布均匀,孔径大小一致。通过高温烧结,多孔合金骨架处的金属颗粒之间形成了烧结颈,发生了烧结结合。生成孔的孔隙度随造孔剂(尿素)的添加量增加而增加,当造孔剂的质量分数为40%时,可得到孔隙度为81.62%的球形多孔材料。多孔材料具有优良的能量吸收性能,其压缩性能随孔隙度和孔径的增加而下降。
The porous superalloy materials with hollow spherical and oriented linear pores were fabricated by means of powder metallurgy using nickel-base superalloy powders.Structure observation reveals that the pores of the porous material exhibit a uniform distribution and the apertures are of same size in principle.The sintering necks create between adjacent particles on metal skeleton after sintering.The porosity of the porous material increase with increasing the addition of pore forming agent,and the hollow spherical porous material with a porosity of 81.62% can be obtained when the addition of pore forming agent is 40%.The compression test indicates that this kind of materials possess excellent energy absorption capability,and the compression resistance decreases with the increasing of porosity and aperture.
出处
《粉末冶金技术》
EI
CAS
CSCD
北大核心
2007年第5期329-335,共7页
Powder Metallurgy Technology
基金
河南省杰出人才创新基金项目(0621000700)
关键词
多孔高温合金
粉末冶金
球形中空孔
定向排列开孔
porous superalloy
powder metallurgy
hollow spherical pores
oriented linear pores
