| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide magnetic grains having magnetocaloric effect practical in the vicinity of room temperature, and also having excellent corrosion resistance, and to provide a method for producing the same. <P>SOLUTION: The magnetic grains are obtained by providing the surface of each alloy grain having a composition expressed by (La-Y)<SB>A</SB>M<SB>B</SB>Si<SB>C</SB>H<SB>D</SB>T<SB>bal</SB>(wherein, M is one or more kinds of elements selected from Ti, Zr and Hf; T includes Fe as an essential element, and, if required, also includes one or more kinds of elements selected from Co, Ni and Cr, and, 6.0≤A≤7.5 atomic%, 0≤B≤5.0 atomic%, 8.0≤C≤14.0 atomic% and 0≤D≤15.0 atomic% are satisfied) with a chemical conversion film with phosphoric acid. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
