碳化硼对硅基陶瓷型芯性能的影响研究
Effect of Boron Carbide on Properties of Silicon-Based Ceramic Core
刘泳鸿 1玄伟东 1张强 1何忠书 1宋昊睿 1邵冠兰 1任忠鸣1
作者信息
- 1. 上海大学 材料科学与工程学院,省部共建高品质特殊钢冶金与制备国家重点实验室,上海 200444
- 折叠
摘要
以石英玻璃粉作为基体材料,添加0～1wt.%的碳化硼为矿化剂,通过热压注法制备了硅基陶瓷型芯,探究了不同碳化硼含量对硅基陶瓷型芯综合性能影响的变化规律.试验结果表明:随着碳化硼含量的增加,样品的收缩率和体积密度逐渐增大,气孔率逐渐减小.此外,室温抗弯强度和高温抗弯强度随着碳化硼含量的增加先增大后减小,高温挠度先减小后增大;当碳化硼含量为0.3wt.%时,陶瓷型芯综合性能得到大幅度改善,收缩率为1.44%,体积密度为1.67 g/cm3,气孔率达到25.51%,室温抗弯强度为16.32 MPa,高温抗弯强度为33.2 MPa,高温挠度为0.19 mm.
Abstract
Silicon-based ceramic cores with different contents of boron carbide were prepared by hot-pressing injection method with quartz glass powder as raw material.The effect of boron carbide with different contents on crystallization and properties of silica ceramic cores was investigated.The experimental results indicated that with the increase of boron carbide contents,the shrinkage rate and bulk density of the sample gradually increased,and the porosity gradually decreased.The room temperature and high temperature of bending strength increased first and then decreased with the increase of boron carbide content,and the high temperature deflection decreased first and then increased.When the contents of boron carbide is 0.3wt.%,the comprehensive properties of the ceramic core are greatly improved,with shrinkage rate of 1.44%,the bulk density of 1.67 g/cm3,the porosity of 25.51%,bending strength of 16.32 MPa at room temperature,bending strength of 33.2 MPa at high temperature,and high temperature deflection of 0.19 mm.
关键词
陶瓷型芯/碳化硼/析晶规律/抗弯强度Key words
ceramic core/boron carbide/crystallization law/bending strength引用本文复制引用
基金项目
国家自然科学基金(52274386)
国家自然科学基金(92060104)
出版年
2024
国家科技期刊平台
NSTL
万方数据