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《Materials for Mechanical Engineering》 2018-01
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Solid-Liquid Synergistic Sintering Kinetics and Densification Model of B_4C Ceramics

SHI Xiumei;CUI Hong;CHEN Gang;CAO Jianwu;TANG Weihong;ZHANG Lijun;School of Materials Science and Engineering,Northwestern Polytechnical University;Ningbo Branch of China Academy of Ordnance Science;Xi′an Aerospace Composites Materials Research Institute;  
B_4C ceramics with different raw powder ratios were prepared by solid-liquid synergistic sintering with different sintering parameters.The influence of sintering temperature and sintering time on the linear shrinkage of B_4C ceramic was studied.The effect of raw powder ratio and sintering temperature on the apparent activation energy was investigated.The solid-liquid synergistic sintering kinetics was analyzed,and the solid-liquid synergisticsintering densification model established considering the sintering temperature,sintering time,raw powder ratio,and green density.The accuracy of the model was assessed.The results show that there was a strong positive correlation between the sintering density predicted by the sintering densification model and sintering density measured,and the average absolute relative error was less than 20%.The model could predict the relationship well between sintering density and the sintering temperature,sintering time,raw powder ratios in the process of solidliquid synergistic sintering of B_4C ceramics.
【Fund】: 宁波市科技局自然科学基金资助项目(2016A610245)
【CateGory Index】: TQ174.1
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