摘要
以电熔镁砂、鳞片石墨、金属铝粉、酚醛树脂为主要原料,研究了B4C外加量(w)为0、0.1%、0.2%和0.3%时对低碳镁碳材料物理性能和抗氧化性能的影响。结果表明:添加少量B4C对试样的显气孔率、体积密度、常温抗折强度、常温耐压强度以及高温抗折强度的影响较小,B4C外加量对试样脱碳层厚度的影响显著:B4C的外加质量分数从0增加到0.1%时,脱碳层厚度减少了36%;当B4C外加质量分数进一步从0.1%增加到0.3%时,脱碳层厚度减少了26%。B4C氧化生成的B2O3等玻璃态物质存在于镁砂颗粒间,阻止了氧气向材料内部的传输。
The fused magnesia,flaky graphite,aluminum powder and phenol resin were mainly used to prepare low carbon MgO-C material.The influence of B4C addition（0,0.1%,0.2%,and 0.3%） on physical properties and oxidation resistance of low carbon MgO-C refractories was investigated.The results show that a little amount of B4C has little effect on apparent porosity,bulk density,cold and hot modulus of rapture,and cold crushing strength,while B4C addition has obvious effect on decarburized depth of the specimens.The decarburized layer depth decreases by 36% and 26% with B4C addition increasing from 0 to 0.1% and from 0.1% to 0.3%,respectively.Glass materials such as B2O3 from B4C oxidation existing among the magnesia particles prevent the transportation of oxygen to inner matrix.
出处
《耐火材料》
CAS
北大核心
2010年第1期14-16,共3页
Refractories
基金
国家自然基金重点基金资助项目(50332010)
关键词
碳化硼
抗氧化剂
低碳镁碳材料
脱碳层
抗氧化性
Boron carbide
Antioxidant
Low carbon magnesia-carbon brick
Decarburization layer
Oxidation resistance
