木纤维基碳化硅木质陶瓷制备工艺  

Research on Silicon Carbide Woodceramics from Poplar Fiber

作　　者：高建民[1] 孟令萱[1,2] 齐景坤[1] 马天[2] 严自力[2] 周中磊[2] 

机构地区：[1]北京林业大学,北京100083 [2]总后勤部军需装备研究所军用汉麻材料研究中心,北京100082

出　　处：《稀有金属材料与工程》2011年第S1期223-226,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50972018)

摘　　要：以杨木纤维为原料,经无胶热压成型、碳化及液相渗硅制备木纤维基碳化硅木质陶瓷。优化了热压工艺并获得具有均一截面密度分布的杨木纤维热压成型体,验证了碳坯对反应烧结工艺的适应性。通过XRD和SEM等方法对木质陶瓷的物相组成、显微结构等进行分析,并初步评价木纤维基碳化硅木质陶瓷的力学性能。结果表明,利用该木质素坯制备的木纤维基碳化硅木质陶瓷具有较高的密度、均匀的显微结构和良好的力学性能。Silicon carbide (SiC) woodceramics was fabricated by self-bonding hot-pressing, pyrolysis and liquid silicon infiltration sequentially with poplar fiber as starting material. Poplar fiber molded block with homogeneous vertical density profile was prepared with optimized hot-pressing process. The carbon templates were also infiltrated with liquid silicon to evaluate their suitability to the liquid silicon infiltration process. The microstructure and phase identification of silicon carbide woodceramics from poplar fiber were characterized with scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results indicate that the silicon carbide woodceramic from poplar fiber has characteristics of high density, even microstructure and high mechanical properties.

关 键 词：木纤维 碳化硅 木质陶瓷 力学性能 

分 类 号：TQ174.1[化学工程—陶瓷工业]