摘要
利用热压工艺制备了B4C/TiC/Al2O3(BAT)喷嘴,利用X射线衍射技术分析喷嘴热压烧结后的组成。结果表明,热压以后的成分为B4C/TiB2/Al2O3。冲蚀实验表明,BAT喷嘴具备优良的抗冲蚀特性,体积冲蚀磨损率最小可达0.14×10-3mm3/g。BAT喷嘴体积冲蚀磨损率由小到大的顺序依次为:BAT21<BAT31<BAT11<BAT13<BAT33<BAT23<BAT22<BAT32<BAT12。结合仿真技术和扫描电镜技术,分析了BAT喷嘴的冲蚀机理。研究表明,BAT喷嘴在入口处的冲蚀机理主要为疲劳断裂;在出口处和中间处的冲蚀机理主要为疲劳断裂和微切削。
Volume erosion rates and erosion resistances of different B4 C/TiC/Al2O3 （BAT） nozzles, prepared successfully by hot-pressing process, are analyzed according to an erosion experiment using SiC as abrasive particle. Compositions of BAT nozzles after sintering are B4C/TiB2/Al2O3 based on XRD method. The lowest volume erosion rate of BAT nozzles is 0.14 × 10^-3 mm^3/g, and it is concluded that those have excellent erosion resistance. Volume erosion rates of different nozzles varies range from the lowest to the highest as following： BAT21 〈 BAT31 〈 BATll 〈 BAT13 〈 BAT33 〈 BAT23 〈 BAT22 〈 BAT32 〈 BAT12. Combination simulation method with SEM technology, erosion mechanisms of BAT nozzle is researched. It is shown that erosion mechanisms at entry, exit and middle of nozzle are different. The erosion mechanism at entry of BAT nozzle is fa- tigue fracture, while the erosion mechanism at exit and middle is combined between fatigue fracture and micro cutting.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2009年第20期23-26,共4页
Journal of Wuhan University of Technology
基金
鲁东大学人才引进基金(LY20074302
LY20074303)
