第2期
Effect of Spherical Ni Powder on Microstructure of Secondary Carbon in MgO-C Refractories Matrix
作者:WANG Xian, ZHU Boquan, LI Xiangcheng, MA Zheng, WEI Ying
作者机构: The Key State Laboratory Breeding Base of Refractories and Ceramics, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
分类号:
卷号:
期号 : 2015 年, 第2期
页码:42 - 45
内容简介

In order to tackle the shortcomings of high brittleness, hard graphitization, and poor oxidation resistance resulted from carbonization of phenolic resin of MgO-C refractories, effects of 2 mass% spherical Ni, and 2 mass% spherical Ni plus 7.5 mass% Al composite powder on microstructure of the secondary carbon in MgO-C refractories matrix were investigated. The results show that a large numbers of carbon whiskers form after the carbonization of phenolic resin with Ni powder; in the MgO-C refractories matrix with only Ni powder, the carbon microspheres form at all treatment temperatures and change slightly with temperature rising; the carbon whiskers begin to generate in the specimens with composite powder at 1 000 , the diameter of carbon whiskers is about 0.4-0.5 μm, and the length is about 3-4 μm, and the formation amount of carbon whiskers increases gradually with temperature rising.

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