温度对硅铁合金氮化产物相组成的影响  

Influence of Temperature on Phase Composition of Nitridation Products from Ferrosilicon Alloy

作　　者：杨景周[1] 黄朝晖[1] 夏银凤[1] 王欣颖[1] 房明浩[1] 刘艳改[1] 

机构地区：[1]中国地质大学(北京)材料科学与工程学院,北京100083

出　　处：《稀有金属材料与工程》2007年第A01期273-275,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50572098);湖北省耐火材料与高温陶瓷重点实验室-省部共建国家重点实验室培育基地开放基金项目(G0608)

摘　　要：分别在1400、1500、1600、1700℃的温度下,于0.9MPa氮气气氛条件下保温3h,对FeSi75硅铁合金粉体进行了氮化实验。研究结果表明:FeSi75合金粉体氮化后产物为Si3N4和Fe3Si,其中1400℃和1500℃氮化产物中的氮化硅为α-Si3N4;1600℃和1700℃氮化产物中的氮化硅为α-Si3N4和β-Si3N4。α-Si3N4的数量随温度升高而减少,β-Si3N4的数量随温度升高而增加。氮化产物Si3N4的显微形貌为针柱状和长柱状。FeSi75 alloy powder was nitridized in nitrogen gas under the pressure of 0.9 MPa, and respectively at 1400, 1500, 1600 and 1700 ℃ for 3 h. The results showed that the nitridation products consisted of Si3N4 and Fe3Si. α-Si3N4 was produced from FeSi75 by nitriding at 1400 ℃ and 1500 ℃, while α-Si3N4 and β-Si3N4 were produced from FeSi75 by nitriding at 1600 ℃ and 1700 ℃. α-Si3N4 content decreased and β-Si3N4 content increased with the increase of nitriding temperature. The morphology of α-Si3N4 grains was needle-like while that of β-Si3N4 grains was column-like.

关 键 词：硅铁合金 氮化 SI3N4 相组成 热力学分析 

分 类 号：TB302[一般工业技术—材料科学与工程]