RO、R2O对金刚石砂轮陶瓷结合剂性能的影响
Effect of RO and R2O on the properties of ceramic binders of diamond grinding wheel
万明 1赵玉成1
作者信息
- 1. 燕山大学 材料科学与工程学院,亚稳材料制备科学与技术国家重点实验室,河北省 秦皇岛 066004
- 折叠
摘要
以R2O-RO-B2O3-Al2O3-SiO2系玻璃为基础结合剂,研究了不同碱金属氧化物以及碱土金属氧化物的引入对陶瓷结合剂性能的影响.通过 X-ray衍射、SEM、三点抗弯等测试方法对制备的陶瓷结合剂样品进行了物相分析、显微结构考察及相关性能的测试.实验结果表明:添加等量的碱土金属氧化物结合剂的各项性能差别不大,主相皆为玻璃相,其中添加 SrO 的陶瓷结合剂烧结后析出β-石英固溶体含量较多,抗折强度为 148 MPa,维氏硬度为 HV 813.17,断裂韧性为 1.9 MPa·m1/2;C2 结合剂的烧结温度高出其他两组 50℃,C1 与C3 的结合剂的烧结温度约为 590℃,断裂韧性为 1.9 MPa·m1/2,维氏硬度为HV 790.5,与金刚石的润湿结合较好;将 Li2O、Na2O、K2O三种碱金属氧化物两两等质量混合,Na2O 与K2O 等质量混合后的结合剂的烧结温度较高.B3 和C1 结合剂对金刚石表现出良好的润湿性.
Abstract
Based on R2O-RO-B2O3-Al2O3-SiO2 glass,the effects of the introduction of dif-ferent alkali metal oxides and alkaline earth metal oxides on the properties of ceramic binders were studied.The prepared ceramic bond samples were analyzed by X-ray diffrac-tion,SEM,three-point bending and other test methods,and the phase analvsis,micro-structure investigation and related performance tests were carried out.experimental re-sults show that the properties of the same amount of alkaline earth metal oxide binder are not much different.the main phase is the glass phase,and the content of β-quartz solid solution is more after sintering of ceramic binding agent with SrO,flexural strength is 148 MPa,Vickers hardness is HV 813.17,and fracture toughness is 1.9 MPa·ml/2;The sintering temperature of C2 binder was 50℃higher than that of the other two groups,the sintering temperature of C1 and C3 binder was about 590℃,the fracture toughness was 1.9 MPa·m1/2,and the Vickers hardness was HV 790.5,which was better in combina-tion with diamond.The three alkali metal oxides of Li2O.Na2O and K2O were mixed in two equal masses,and the sintering temperature of the binder aftelmixing Na2O and K2O was high.B3 and C1 binders show good wettability to diamonds.
关键词
金刚石/陶瓷结合剂/断裂韧性/润湿性Key words
Diamond/ceramic binders/fracture toughness/wettability引用本文复制引用
基金项目
河北省自然科学基金(E2017203223)
出版年
2024
NETL
NSTL
万方数据