摘要
采用MnO_2作为添加剂自蔓延高温合成法制备了具有Al_2O_3和FeAl_2O_4陶瓷层的复合钢管,研究其对陶瓷层和过渡层的结构和性能的影响。结果表明:添加了MnO_2后,陶瓷层表面晶粒排布更加致密,陶瓷层的内表面为层叠状的Al_2O_3细晶和少量的FeAl_2O_4:过渡层为Al_2O_3和混入的FeAl_2O_4外,还含有SiO_2和MnO_2,过渡层出现了向钢基体中渗透的网状结构。MnO_2的加入并未改变复合钢管Al_2O_3和FeAl_2O_4陶瓷层的物相。加入4%(质量分数)MnO_2的复合管的抗压度强度和陶瓷层的抗剪强度分别达到416MPa和19.2MPa,比未添加MnO_2的样品分别提高了18.2%和12.3%
Ceramic-lined composite steel pipe with an Al2O3 and FeAl2O4 ceramic layer was prepared by the self-propagating high-temperature synthesis method using MnO2 powder as additive, and the effects of MnO2 on the structure and mechanical properties of the ceramic layer and interlayer were studied. The results show that the microstructure of the surface on the ceramic layer with MnO2 added is denser than that without MnO2 added. And inner surface on the ceramic layer is stackup Al2O3 cryptomere and less FeAl2O4. The interlayer is composed of Al2O3 and FeAl2O4, exception, also contain a few of SiO2 and MnO2. A net-like structure penetrating from the interlayer to the steel appears after MnO2 has been added. The phases in the ceramic layer with MnO2 added are Al2O3 and FeAl2O4, the same as that without MnO2 added. The compression strength of the composite pipe and the shearing strength of the ceramic layer are 416 MPa under 4% （in mass） MnO2 and 19.2 MPa, 18.2% and 12.3 % greater than without MnO2 added.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2007年第11期1541-1545,共5页
Journal of The Chinese Ceramic Society
基金
山东理工大学科研基金(2006KJM31)资助项目。
关键词
自蔓延高温合成
添加剂
过渡层
力学性能
self-propagating high-temperature synthesis
additives
interlayer
mechanical properties
