纳米复合金属陶瓷模具材料的研究进展

纳米复合金属陶瓷材料不仅具有较好的综合机械性能,如高强度、高硬度、耐高温、耐磨损,而且具有较好的化学稳定性、抗氧化性能和耐腐蚀性能,在模具制造方面具有广阔前景.本文综述了纳米复合金属陶瓷材料的研究现状及存在问题,并指出了今后研究的发展趋势.     

Composition, Processing Technology and Property of Ceramic Die Materials Containing Rare Earth Additives

Development and application of new ceramic die materials is one of the important topics in the field of die research. The composition, processing technology, mechanical property and engineering performance of the ceramic materials such as cermet, ZTA, TZP, TZP/Al2O3, TZP/TiC/Al2O3, PSZ and Sialon, etc., with rare earth yttrium, lanthanum and cerium, and so on working as additives, were investigated and analyzed in the present study. Problems existed in the research and application of rare earth ceramic die materials were discussed. Rare earth additives can effectively improve the mechanical property and engineering performance of ceramic die materials. Thus, it will have further perspectives of wider application. More attention should be paid in the future to the toughening and strengthening of the ceramic die materials, the adding forms and kinds of rare earth elements and acting mechanisms of rare earth additives in ceramic die materials.     

福建沿海花岗岩残积土的工程性能分析

对花岗岩残积土进行分类 ,分析花岗岩残积土的垂直分带特征及相应的物理力学性能 ,阐明花岗岩残积土作为地基持力层和回填土的工程应用。