Microstructural evolutions during HDDR phenomena in Sm2Fe17Nx compounds
Microstructural evolutions during HDDR phenomena in Sm2Fe17Nx compounds
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DOI：
10.1016/0925-8388(95)01838-7
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发表时间：
1995-12
影响因子：
6.2
通讯作者：
M. Okada;Kotaro Saito;Hajime Nakamura;S. Sugimoto;M. Homma
中科院分区：
文献类型：
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作者：
M. Okada;Kotaro Saito;Hajime Nakamura;S. Sugimoto;M. Homma
用透射电镜观察了Sm_2Fe_（17）颗粒HDDR过程中的微观结构演变。Sm_2Fe_（17）化合物在510°C以上氢气氛中热处理后，发生了SmH_2和α-Fe相的歧化，晶体关系为α-Fe {110} //SmH_2 {111}。SmH 2相的脱氢引发了还原反应，α-Fe相通过复合扩散进入SmH 2颗粒，形成Sm 2 + δ Fe 17相。在真空中长时间时效可形成直径为100-300 nm的Sm_2Fe_（17）细晶。
Microstructural evolutions during HDDR phenomena in Sm2Fe17particles were observed by transmission electron microscopy. Sm2Fe17compounds heat-treated over 510°C in a H2atmosphere disproportionate into SmH2and α-Fe phases with crystal relationship of α-Fe {110} // SmH2{111}. Recombination reactions were initiated by desorbing hydrogen from SmH2phases, and α-Fe phases diffuse into SmH2particles to form Sm2 + δFe17phases by recombination. Prolonged aging in vacuum forms Sm2Fe17fine grains of 100–300 nm in diameter.