Refinement of TiB_(2)Powders with High-speed Planetary Mill and Its Effect on TiB_(2)Sinterability  

作　　者：HUANG Qiwei AI Ruomeng BAI Wenhui HE Qianglong WANG Aiyang HU Lanxin WANG Weimin 黄啟伟;AI Ruomeng;BAI Wenhui;HE Qianglong;WANG Aiyang;HU Lanxin;王为民(The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2021年第3期331-337,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Key Research and Development Plan of China(No.2017YFB0310400);the National Natural Science Foundation of China(No.5167020705)。

摘　　要：Titanium diboride ceramic was produced via spark plasma sintering(SPS)using finer TiB_(2)powder made by high-speed planetary ball milling.The effects of ball milling parameters on the composites and particle size of TiB_(2)powder were investigated.It was shown that the average particle size of TiB_(2)powder decreased from 5.8 to 1.59μm and the wear rate of WC balls was 1.58 wt%,when the ball-to-powder weight ratio(BPR),the rotary speed and milling time and were 10:1,600 rpm and 20 min,respectively.The content of WC in TiB_(2)powder can be limited below 4.58 vol%by optimizing the milling conditions.The sintering temperature of TiB_(2)powder milled can be decreased obviously,and the mechanical properties are evidently improved and the microstructure becomes more homogeneous when the powder of TiB_(2)becomes finer.The relative density,hardness,bending strength,and fracture toughness of the TiB_(2)ceramic fabricated at 1700℃reach the optimal values,which are 98.13%,19.14 GPa,756 MPa,and 5.71 MPa·m~(1/2),respectively.The decrease of TiB_(2)particle size and the introduction of WC are the potential reasons for the improvement of TiB_(2)ceramic performance.

关 键 词：TiB_(2)ceramic high-speed planetary ball mill particle size WC mechanical property 

分 类 号：TQ174.1[化学工程—陶瓷工业]