Structure and magnetic properties of high-performanced Sm₂(Co, Fe, Cu, Zr)₁₇ alloys

来源期刊：中国有色金属学报(英文版)2002年第2期

论文作者：李丽娅 易健宏 彭元东 唐新文 曾庆灵 付应生 罗述东

文章页码：294 - 296

Key words：magnets; temperature coefficient; magnetic and microstructure properties

Abstract: The magnetic properties of Sm₂(Co,Fe,Cu,Zr)₁₇ alloys are very sensitive to heat treatments. A magnet with B_r of 1.08T, H_ci of 2312kA·m^-1 and (BH)_max of 211.0kJ·m^-3 has been obtained after sintering at 1201℃ and aging at 830℃. The magnet has a very low temperature coefficient (β) of -0.18%/℃. The maxim um operating temperature is dramatically higher than commercial magnets. The microstructure analysis shows that Sm₂(Co,Fe)₁₇, Sm(Co,Cu)₅ and Co₂Zr are found in the magnet. The EDAX analysis shows that the cells are enriched in Fe, but depleted in Cu and Zr, whereas the cell boundaries are Cu and Zr enriched, but Fe depleted.