摘要
以板状刚玉(粒度≤1、≤0.075 mm)、Al-Si合金粉(粒度为50μm)、α-Al_(2)O_(3)微粉(粒度为5μm)、鳞片石墨(粒度≤0.074 mm)和B_(4)C粉(粒度为20μm)为原料,硝酸镍为催化剂,酚醛树脂为结合剂制备了Al_(2)O_(3)-C材料,研究了B_(4)C添加量(加入质量分数分别为0、3%、6%和9%)对Al_(2)O_(3)-C材料性能的影响。结果表明:1)随着B_(4)C添加量的增加,试样的线变化率明显减小,常温抗折强度和耐压强度明显增大;当B_(4)C添加量为3%(w)时,试样经1450℃处理后的线变化率降至0.65%,常温抗折强度和耐压强度最高,分别为28.7和57.3 MPa。2)当B_(4)C添加量为6%(w)时,试样经1400℃空气气氛氧化后的氧化指数降至3.9%,抗氧化能力明显增强。
Al_(2)O_(3)-C materials were prepared using tabular corundum(≤1 and≤0.075 mm),Al-Si alloy powder(50μm),α-Al_(2)O_(3)micropowder(5μm),flake graphite(≤0.074 mm)and B_(4)C powder(20μm)as raw materials,nickel nitrate as the catalyst,and phenolic resin as the binder.Effects of B_(4)C additions(0,3%,6%and 9%,by mass)on the properties of Al_(2)O_(3)-C materials were investigated.The results show that:(1)with the increase of the B_(4)C addition,the linear change rate of the specimens decreases obviously,the cold modulus of rupture and the cold compressive strength increase significantly;with 3%B_(4)C,the linear change rate of the specimen after treatment at 1450℃decreases to 0.65%,the cold modulus of rupture and the cold compressive strength increase to the maximum values of 28.7 and 57.3 MPa,respectively;(2)with 6%B_(4)C,the oxidation index of the specimen oxidized at 1400℃in air atmosphere decreases to a minimum of 3.9%,showing significantly enhanced oxidation resistance.
作者
邹鑫
肖学平
宋雅楠
陈平安
朱颖丽
李享成
Zou Xin;Xiao Xueping;Song Yanan;Chen Ping’an;Zhu Yingli;Li Xiangcheng(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;不详)
出处
《耐火材料》
CAS
北大核心
2023年第4期310-313,共4页
Refractories
基金
湖北省重点研发项目(2020BAA028)
湖北省创新群体项目(2020CFA038)
国家自然科学基金项目(51972242和51774218)。
