用XRD研究Sm_2Fe_(17)合金氮化行为  

Analysis on Nitration Process of Sm_2Fe_(17) Powder by XRD Method

作　　者：叶金文[1] 刘颖[1] 王东[1] 朱国丽[1] 高升吉[1] 涂铭旌[1] 

机构地区：[1]四川大学,四川成都610065

出　　处：《稀有金属材料与工程》2006年第11期1835-1837,共3页Rare Metal Materials and Engineering

摘　　要：通过XRD分析了Sm2Fe17合金的氮化行为及该过程中合金的结构演变规律。结果表明：Sm2Fe17合金粉末在460℃～510℃氮化5h的过程中，随着氮化温度的升高，合金的晶格常数、体积膨胀量不断增加，预示着合金中氮含量的增加，490℃时角度偏移量最大达到约0．9°，晶胞体积膨胀量达6．568％，合金中的氮含量达到最大值；500℃以后氮化物的分解占主导地位。同时，建立了Sm2Fe17合金粉末的氮化过程的物理模型。The nitration process of Sm2Fe17 alloy powder and its microstructure evolution during nitriding were investigated by XRD （X-Ray Diffraction ）, The result shows that when the Sm2Fe17 powders nitrided for 5 hours from 460℃ to 510℃, the lattice constant of the alloy and expanding of the crystal cell increased with the increase of temperature, which indicated that the nitrogen content in the alloy was enhanced, The diffraction angle offset reached the maximum of about 0.9° and the expanding of the crystal cell reached its top value of 6.6568% after alloy was nitrided at 490℃ for 5 hours. When the temperature rised up to more than 500℃, the decomposition of the nitride dominanted, Furthermore, the physical model of the nitration process was set up.

关 键 词：稀土 永磁 SMFEN XRD 

分 类 号：TM273[一般工业技术—材料科学与工程]