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Nanocomposite bulk magnet and process for producing same 发明授权

2023-09-03 1040 2728K 0

专利信息

申请日期 2025-07-10 申请号 US13260758
公开(公告)号 US8961868B2 公开(公告)日 2015-02-24
公开国别 US 申请人省市代码 全国
申请人 Toshio Miyoshi
简介 In a nanocomposite bulk magnet according to the present invention, nanocomposite magnet powder particles, including an Nd2Fe14B crystalline phase and an α-Fe phase, are combined together. The composition of the magnet is represented by T100-x-y-z-n(B1-qCq)xRyTizMn, where T is at least one transition metal element selected from the group consisting of Fe, Co and Ni and always including Fe, R is at least one rare-earth element including substantially no La or Ce, M is an additive metallic element, and x, y, z, n and q satisfy 4 at %≦x≦10 at %, 6 at %≦y≦10 at %, 0.05 at %≦z≦5 at %, 0 at %≦n≦10 at %, and 0≦q≦0.5, respectively. The powder particles have a minor-axis size of less than 40 μm. And powder particles, of which the major-axis size exceeds 53 μm, account for at least 90 mass % of the entire magnet. And those powder particles are directly combined with each other. Consequently, a full-dense magnet, of which the density is 96% or more of the true density of its material alloy, is realized.


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