硅酸盐学报

MnO_2对自蔓延高温合成陶瓷复合钢管陶瓷层结构和性能的影响

作者：张磊焦万丽

单位：山东理工大学材料科学与工程学院山东理工大学材料科学与工程学院山东淄博 255049 山东淄博 255049

关键词：自蔓延高温合成添加剂过渡层力学性能

分类号：TQ174

出版年,卷(期):页码：2007,35(11):1541-1545

DOI：

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 Al_2O_3 and FeAl_2O_4 ceramic layer was prepared by the self-propagating high-temperature synthesis method using MnO_2 powder as additive,and the effects of MnO_2 on the structure and mechanical proper- ties of the ceramic layer and interlayer were studied.The results show that the microstructure of the surface on the ceramic layer with MnO_2 added is denser than that without MnO_2 added.And inner surface on the ceramic layer is stackup Al_2O_3 cryptomere and less FeAl_2O_4.The interlayer is composed of Al_2O_3 and FeAl_2O_4,exception,also contain a few of SiO_2 and MnO_2.A net-like structure penetrating from the interlayer to the steel appears after MnO_2 has been added.The phases in the ceramic layer with MnO_2 added are Al_2O_3 and FeAl_2O_4,the same as that without MnO_2 added.The compression strength of the composite pipe and the shearing strength of the ceramic layer are 416 MPa under 4%(in mass) MnO_2 and 19.2 MPa,18.2% and 12.3% greater than without MnO_2 added.

基金项目：

山东理工大学科研基金(2006KJM31)资助项目。

作者简介：

参考文献：

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