真空烧结制备三维通孔不锈钢泡沫材料  

Vacuum sintering of stainless steel foam with 3-D open-cell network structure

作　　者：王辉[1] 周向阳[1] 李昌林[1] 李劼[1] 宋泓宇[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2011年第8期2178-2183,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(50974136);中南大学米塔尔创新项目(08MX14)

摘　　要：采用真空烧结制备具有三维通孔网状结构的316L不锈钢泡沫材料,研究烧结温度和保温时间对不锈钢泡沫材料的表观密度、开孔孔隙率、抗弯强度、抗氧化性等方面的影响。研究结果表明:随着烧结温度的升高,泡沫材料的表观密度和线收缩率增大,抗氧化性能提高,开孔孔隙率减小;随着烧结温度的升高,泡沫材料抗弯强度明显增大,但当烧结温度超过1 260℃,由于液相的产生,使其抗弯强度降低;随着保温时间的延长,不锈钢泡沫的表观密度、线收缩率和抗弯强度增大,开孔孔隙率降低;前驱体在1 260℃温度下烧结60 min,可制得孔径为1 mm左右、具有良好三维通孔结构的不锈钢泡沫,该泡沫的开孔孔隙率为81.4%,抗弯强度达56.8 MPa。The stainless steel foam with 3-D open-cell network structure were prepared by vacuum sintering.The effects of sintering temperature and soaked time on the apparent density,open porosity,bending strength and oxidation resistance performance of the stainless steel foam were investigated.The experimental results show that with the increase of the sintering temperature,the apparent density,linear shrinkage rate and oxidation resistance performance of the sintered product increase,but the open porosity reduces;the bending strength firstly rises and then declines after the temperature exceeds 1 260 ℃ because of the emergence of liquid;with the prolongation of the soaked time,the apparent density,linear shrinkage rate and oxidation resistance performance augment,the open porosity reduces.When the precursor is sintered at 1 260 ℃ for 60 min,the stainless steel foam with favorable 3-D open-cell network structure can be obtained,of which the aperture size is about 1 mm,the open porosity is 81.4% and the bending strength is 56.8 MPa.

关 键 词：真空烧结 不锈钢泡沫 抗弯强度 抗高温氧化性 

分 类 号：TG142.71[一般工业技术—材料科学与工程]