金属-氮化物结合刚玉质滑板的结构与性能  

Structure and Properties of Metal-Nitride Bonded Corundum Slide Plate

作　　者：卜景龙[1,2] 杨晓春[3] 王志发[1] 王瑞生[1] 王榕林[1] 王春梅[3] 孙加林[4] 

机构地区：[1]河北理工大学材料学院 [2]北京科技大学材料学院,北京100083 [3]唐钢耐火材料有限公司 [4]北京科技大学材料学院

出　　处：《过程工程学报》2005年第3期313-316,共4页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:50332010);河北省自然科学基金资助项目(编号:E2004000436)

摘　　要：由80%～90%板状刚玉及20%～10%金属铝组成的坯料经氮化处理(温度1100℃)后,再进行表面氧化处理(温度800℃),可制得显气孔率为2%的Al?AlN?Al2O3滑板材料,其1400℃高温抗折强度高达48.7MPa.该滑板材料浇钢的使用寿命是Al2O3?C滑板的2倍.显微结构分析表明,部分金属铝氮化形成AlN的体积膨胀效应及其对刚玉晶粒的结合作用,提高了材料的结构致密度和强度,赋予材料优良的抗钢液侵蚀性能.部分金属铝的高温塑性状态、金属铝及氮化铝的高导热性、刚玉与氮化铝的复相热失配等,是材料具有高抗热震性能的主要原因.The slide plate with 2% apparent porosity was prepared in a composition of 80%～90% tabular corundum and 20%～10% metal aluminum with nitridation (1100℃) and oxidation on the plate surface (800℃). The bending strength of this slide plate is up to 48.7 MPa at 1400℃, and its service life is two times as that of Al2O3?C slide plate when used in the process of pouring steel. Analysis of the plate microstructure shows that the plate density and strength can be increased, and excellent performance of erosion resistance to liquid steel can be obtained because of the volumetric expansion of AlN resulting from the nitridation of partial metallic aluminum and the effect of combining with corundum grains. High temperature plasticity state of some metallic aluminum, high heat conductivity of melting aluminum and aluminum nitride, multiphase thermal expansion coefficient mismatch of corundum and aluminum nitride are the main reasons why the material has high thermal shock resistance.

关 键 词：结构与性能 刚玉质 氮化物 AL2O3-C 表面氧化处理 高温抗折强度 滑板材料 抗热震性能 金属铝 氮化处理 板状刚玉 显气孔率 显微结构 使用寿命 结合作用 膨胀效应 塑性状态 侵蚀性能 AIN 氮化铝 分析表 致密度 导热性 热失配 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业] TQ175.712