作者：ZHU Boquan1LI Xiangcheng1CHEN Ping'an1WEI Guoping2WANG Xuan3

作者单位：1. The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology 2. Zhejiang Zili High Temperature Technology Co.,Ltd. 3. Shandong Shengquan New Materials Co.,Ltd.

刊名：China’s Refractories

ISSN：1004-4493

出版年：2018-09-15

卷：27

期：3

起页：8-20

止页：

分类号：TQ175.1

语种：英文

关键词：

内容简介

Gaseous phases of carbon-containing and metastable oxides will be resulted from the carbonization of phenolic resin binders and the reduced reactions between C and oxides at high temperatures in carbon-containing refractories. With the in-situ catalysis technique, these gaseous phases can be transformed to one-or two-dimensional bonding phases by deposition,which is favorable for the improvement on strength and toughness of carboncontaining refractories,especially low carbon refractories. The research results reveal that:（ 1） the amorphous carbon resulted from phenolic resin can be transformed to carbon nanotubes,thus,the oxidation peak temperature is raised from 506 to 664. 6 ℃;（ 2） onedimensional whiskers of MgO or Mg Al2 O4 can be in-situ formed in MgO-C refractories, and their CMOR,CCS,rupture displacement and residual CCS（ two water quenching cycles,1 100 ℃） are increased by 66%,47%,13% and 26%,respectively;（ 3） two-dimensional array structure of flake β-SiAlON can be in-situ formed in Al2 O3-C refractories,which improves the material strength by 60% and decreases the residual strength after thermal shock by only 4. 5 MPa. It is believed that the in-situ formation of one-or two-dimensional bonding phases at high temperatures can improvethe comprehensive thermal physical properties of carboncontaining refractories,and will be the developing trend of the strengthening and toughening of low carbon-containing refractories.