Preparation of Mullite-Glass Coating on the Surface of Metal Mold

Li Mian; Liu Jianrui; Huang Weidong

doi:10.15980/j.tzzz.2014.05.018

Views : 0 下载量: 115 CSCD: 2

Export
Share
Collection
Album

Preparation of Mullite-Glass Coating on the Surface of Metal Mold
Vol. 34, Issue 5, Pages: 521-525(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.05.018

扫描看全文

[1]李勉,刘建睿,黄卫东.金属型表面莫来石-玻璃复合涂层的制备[J].特种铸造及有色合金,2014,34(05):521-525.

Li Mian, Liu Jianrui, Huang Weidong. Preparation of Mullite-Glass Coating on the Surface of Metal Mold. [J]. Special Casting & Nonferrous Alloys 34(5):521-525(2014)
[1]李勉,刘建睿,黄卫东.金属型表面莫来石-玻璃复合涂层的制备[J].特种铸造及有色合金,2014,34(05):521-525. DOI： 10.15980/j.tzzz.2014.05.018.

Li Mian, Liu Jianrui, Huang Weidong. Preparation of Mullite-Glass Coating on the Surface of Metal Mold. [J]. Special Casting & Nonferrous Alloys 34(5):521-525(2014) DOI： 10.15980/j.tzzz.2014.05.018.

摘要

以Al2O3和SiO2为反应物料

加入低熔点玻璃粉

采用热化学反应在金属型表面制备莫来石-玻璃涂层。考察了涂层制备工艺参数对涂层与金属基体结合强度的影响

并利用XRD、SEM和EDS分析了涂层相组成、截面微观结构及元素分布。结果表明

对反应物料进行球磨混合

可增加涂层与金属基体结合强度;提高反应温度、延长反应时间、增加玻璃粉添加量

涂层与基体结合强度呈现先增加后减小趋势。当Al2O3、SiO2、玻璃粉的质量比为2∶1∶3

在720℃反应2h形成的涂层与基体结合紧密

结合强度达8.95MPa。涂层与基体间主要以化学、扩散的方式结合

涂层主要由3Al2O3·2SiO2、Al2SiO5相、非晶玻璃粉及少量Al2O3、SiO2、Fe3Al、FeAl相等组成。

Abstract

A kind of mullite-glass coating was prepared on the surface of metal mold by thermo chemical reaction method with Al2O3

SiO2and fusible glass powder.Influences of the process parameters on the bonding strength between coating and metal matrix were investigated.The phase compositions

microstructure of the coating and element distribution were analyzed by XRD（X-ray diffraction）

SEM（scanning electron microscope）

EDS（energy dispersedly spectrometer）

respectively.Experimental results show that reaction materials after ball-milling can improve the bonding strength of coating with substrate.The bonding strength of coating with substrate is increased firstly and then decreased with the increase of the reaction time

reaction temperature and the content of fusible glass powder.The coating which formed on the surface of metal substrate at 720℃for 2his tightly combined with substrate according to the mass ratio of Al2O3

SiO2and glass powder with 2∶1∶3

and the bonding strength reaches up to 8.95MPa.The interface bonding of coating and substrate is mainly characterized by chemical and diffusional bonding.The coating is mainly composed of 3Al2O3·2SiO2

Al2SiO5

amorphous glass powder and a small amount of Al2O3

Fe3Al

FeAl

SiO2.