摘要
通过成分分析、微观结构分析、力学分析等方式对比研究了Al_(2)O_(3)、ZnO含量对Li_(2)O-ZnO-SiO_(2)系玻璃结合剂性能影响。实验结果表明:尖晶石系微晶形成于结合剂的熔炼阶段,随着Al_(2)O_(3)含量升高、ZnO含量降低,体系中的尖晶石晶型会由锌尖晶石向富铝锌尖晶石转化,结合剂密度随之下降;其烧结体会出现锂铝硅酸盐析晶,析晶量随着Al_(2)O_(3)含量升高,ZnO含量降低而增强;结合剂烧结体的析晶量增强会同时导致烧结孔隙的占比增加,在微晶弥散强化与孔隙的共同作用下,该结合剂体系Al_(2)O_(3)含量为12 mol%、ZnO含量为6 mol%时的烧结试样有最高抗弯强度。
The influence of Al_(2)O_(3) and ZnO content on the properties of Li_(2)O-ZnO-SiO_(2)glass ceramics binders is studied by material composition analysis,microstructure analysis and mechanical analysis.The experimental result shows that the spinel crystal phase in the binder is formed at the melting stage.With the content of Al_(2)O_(3) increased and ZnO content decreased,the spinel crystal phase will be converted from zinc spinel to aluminum-rich zinc spinel,and this leads to a decrease of the binder’s density.The crystallization phase of lithium-aluminum silicate will appear after the binder sintered,and this kind of crystallization phase is increased with the increasing of Al_(2)O_(3) content and the decreasing of ZnO content.What’s more,when the lithium-aluminum silicate crystallization phase’s enhancement is increased,the sintered sample’s proportion of the sintered pore increases as long.Because of the combined action of microcrystalline dispersion reinforcement and pore,when the Al_(2)O_(3) content is 12mol%and the ZnO content is 6 mol%,the sintered sample has the highest flexural strength.
作者
潘晓毅
陈超
莫宁
秦海青
骆颖
王文龙
李运海
PAN Xiaoyi;CHEN Chao;MO Ning;QIN Haiqing;LUO Ying;WANG Wenlong;LI Yunhai(Guangxi Key Laboratory of Superhard Materials,Guilin 541004,China;National Engineering Technology Research Center for Special Mineral Materials,Guilin 541004,China;Guilin Tebang New Materials Co.,LTD.,Guilin 541004,China;China Nonferrous Metals(Guilin)Geology and Mining Co.,Ltd.,Guilin 541004,China)
出处
《超硬材料工程》
CAS
2023年第3期21-25,共5页
Superhard Material Engineering
基金
广西重点研发计划(编号:桂科AB20159010)
“三企入桂”科技创新支撑能力提升(编号:2021H0201-2)
中国有色桂林矿产地质研究院有限公司创新基金(编号:KDYCXJJ202115)。
关键词
微晶玻璃
尖晶石相
超硬材料
金刚石
磨具
glass ceramics
spinel phase
ultrahard material
diamond
abrasive tools
