{"id":10453,"date":"2026-09-04T15:38:44","date_gmt":"2026-09-04T07:38:44","guid":{"rendered":"https:\/\/am-material.com\/?p=10453"},"modified":"2026-07-22T15:46:30","modified_gmt":"2026-07-22T07:46:30","slug":"complete-guide-to-fenimo-soft-magnetic-powder-for-additive-manufacturing","status":"publish","type":"post","link":"https:\/\/am-material.com\/ja\/news\/complete-guide-to-fenimo-soft-magnetic-powder-for-additive-manufacturing\/","title":{"rendered":"Complete Guide to FeNiMo Soft Magnetic Powder for Additive Manufacturing"},"content":{"rendered":"

\u7c21\u5358\u306a\u56de\u7b54<\/h2>\n\n\n\n

FeNiMo soft magnetic powder<\/strong> is the powder-metallurgy form of molybdenum permalloy, a nickel-iron-molybdenum alloy containing roughly 78-80 percent nickel and 4-5 percent molybdenum that delivers the highest magnetic permeability of any commercially practical alloy system. Gas-atomized spherical powder is supplied in 15-45 um cuts for LPBF, 0-25 um for MIM, and insulated fractions for pressed powder cores, with initial permeability of 50,000-100,000, coercivity below 5 A\/m, and electrical resistivity two to three times that of silicon iron. The alloy serves magnetic shielding, high-frequency inductor cores, precision current sensors, and flux concentrators wherever minimum core loss and maximum permeability outweigh its moderate 0.75-0.9 T saturation induction.<\/p>\n\n\n\n

\u30d7\u30ed\u30d1\u30c6\u30a3<\/th>\u4fa1\u5024<\/th><\/tr><\/thead>
\u5408\u91d1\u30b7\u30b9\u30c6\u30e0<\/td>Ni-Fe-Mo molybdenum permalloy (~79Ni-4Mo-Fe)<\/td><\/tr>
\u5bc6\u5ea6<\/td>8.7 g\/cm3<\/td><\/tr>
\u4ee3\u8868\u7684\u306a\u7c89\u672b\u7c92\u5f84\uff08LPBF\uff09<\/td>15\uff5e45 \u00b5m<\/td><\/tr>
Typical Powder Size (MIM\/cores)<\/td>0-25 um<\/td><\/tr>
Initial Permeability<\/td>50,000-100,000<\/td><\/tr>
\u4fdd\u78c1\u529b\uff08\u713c\u920d\u5f8c\uff09<\/td>< 5 A\/m<\/td><\/tr>
\u98fd\u548c\u8a98\u5c0e<\/td>0.75-0.9 T<\/td><\/tr>
\u96fb\u6c17\u62b5\u6297\u7387<\/td>0.55-0.62 uOhm.m<\/td><\/tr>
\u4e3b\u306a\u5229\u70b9<\/td>Highest practical permeability with very low core loss<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

What Is FeNiMo Soft Magnetic Powder and Its Material Benefits<\/h2>\n\n\n\n

FeNiMo soft magnetic powder<\/strong> \u306f\uff5e\u306b\u5c5e\u3059\u308b \u8edf\u78c1\u6027\u7c89\u672b<\/a> family and replicates the chemistry of molybdenum permalloy, the alloy class that has defined the upper limit of magnetic softness for over half a century. The molybdenum addition to the high-nickel permalloy base is the critical refinement: it raises electrical resistivity, which suppresses eddy-current loss, and it permits simultaneous minimization of magnetocrystalline anisotropy and magnetostriction through heat treatment, the two physical properties that together determine how freely domain walls move.<\/p>\n\n\n\n

In powder form, the alloy’s benefits for engineering programs include:<\/p>\n\n\n\n