微晶玻璃的耐磨性研究

（申请工学硕士学位论文） 钙铝硅系微晶玻璃结构 与耐磨性的研究 培养单位：材料学院 专业名称：材料学 研 究 生：钮 锋 指导老师：何 峰 教 授

2005年5月 钙

铝

硅系

微晶

玻

璃结

构

与耐

磨性

的研究

钮

锋

武

汉理

工

大

学

分类号密级

UDC 学校代码 10497

学 位 论 文

题 目 钙铝硅系微晶玻璃结构与耐磨性的研究

英 文 Research of Microstructure and Wear-Resistance 题 目on the CaO-Al2O3-SiO2 Glass-ceramics

研究生姓名 钮 锋

姓名 何峰 职称 教授 学位 硕士 指导教师

单位名称 武汉理工大学材料学院 邮编 430070 申请学位级别 硕士 学科专业名称 材料学 论文提交日期 论文答辩日期 学位授予单位 武汉理工大学 学位授予日期

答辩委员会主席 评阅人 刘继翔

汤李缨

2005年 6 月

摘 要

近年来，随着CaO-Al2O3-SiO2系统微晶玻璃产业的发展，以及装饰装修的兴起，已经有大量建筑物应用了建筑装饰微晶玻璃。但是使用后发现，微晶玻璃装饰板材表面会出现的“划伤”现象，失去其原有的装饰效果，使其应用范围受到限制。

本课题就以β－硅灰石为主要晶相的微晶玻璃（CaO-Al2O3-SiO2系统）为研究对象，利用烧结法制备微晶玻璃，采用调整基础玻璃配方组成CaO和Al2O3，来调节析出晶体的种类大小及其含量，研究不同晶相含量与微晶玻璃耐磨性能的关系，并分析其对其微观结构、硬度等力学性能的影响。此外，还采用直接加入增韧剂ZrO2的方法，研究加入ZrO2对微晶玻璃结构、耐磨性能的影响。同时还研究了ZrO2对微晶玻璃烧结析晶的影响。

实验中采用磨料磨损的方式。以60目和130目的锆英砂和100目的SiC作为磨料，在道瑞式耐磨性试验机上测试微晶玻璃的耐磨性能，并通过观察试样磨损后的表面微观形貌，来分析其磨损的机理。

实验结果表明：CaO的引入有利于微晶玻璃的析晶，从而提高了材料的耐磨性能；Al2O3的引入虽然降低玻璃的结晶倾向，但是可以使玻璃体更加致密，并提高了玻璃相的力学性能，综合两种作用，微晶玻璃整体的耐磨性得到了一定程度的提高；ZrO2的引入会提高玻璃的粘度，使其烧结收缩率下降，不利于微晶玻璃的烧结。然而ZrO2对微晶玻璃的析晶有一定的促进作用，并且其具有的增韧效果，可以提高微晶玻璃的耐磨性能。

在磨损试验中，对于锆英砂磨料，颗粒越大，磨损量越高；对于不同的磨料，锆英砂和SiC，锆英砂硬度高于SiC，其磨损量也远大于SiC。在小颗粒松散磨料的低磨损区，磨损机理主要是微观切削磨损机理，表面有明显的犁沟或者印痕。在大颗粒的高磨损区，磨损行为包含多种机理，表面的磨损形貌也很复杂。

关键词：微晶玻璃耐磨性能增韧磨损机理

Abstract

In recent years, with the development of the glass-ceramics industry of CaO-Al2O3-SiO2 system, and the rise of the decorations, a large number of buildings have used the building decorated glass-ceramics already. But after using for a certain time, the scratching phenomenon that the building decorated glass-ceramics surface will appear, make it lose its already existing ornament effect, and limit the range of application.

The subject takes the CaO-Al2O3-SiO2 glass-ceramics of which main crystallization phase is β-wollastonite as the research object, prepares the glass-ceramics by sintering .The kinds, sizes and contents of the crystallization are controlled by adjusting the content of the basic glass components, such as CaO and Al2O3. The relationship between the content of components and the wear-resistance performance of the glass-ceramics is studied, and analyzes its impact on its microstructure and mechanics performance, such as hardness, etc. In addition, ZrO2 is imported directly to increase the toughness of the glass-ceramics, and the influence of ZrO2 on microstructure and wear-resisting performance is researched. Also the effect of ZrO2 on the sintering and crystallization of the glass-ceramics is investigated at the same time.

Abrasion wear is taken as the main wear mode in the experiments. The zircon of 60 and 130 meshes, and the SiC of 130 meshes are used as the abrasives, in order to test the wear-resisting performance of the glass-ceramics on the wear-testing machine. The wear mechanism is studied after the wear test by observing the surface microstructure.

The experimental results shows that the increase of CaO promotes the crystallization of glass-ceramics, thus improves the wear-resisting performance of the material ; The introduction of Al2O3 reduces the crystallization inclination of the glass, but can make the vitreous body more compacted , and also improves the mechanics performance of the glass phase, synthesizes two kinds of effect, the wear-resistance of the glass-ceramics has got the improvement of a certain degree; The intake of ZrO2 improves the viscidity of the glass, and has a baffling effect on sintering shrinkage of glass particle, and negative effect on the sintering of the glass-ceramics. However, the intake of ZrO2 promotes the crystallization of glass-ceramics, and can also increase the toughness of the materials, so the wear-resistance is finally improved.