高压对大块（PrNd）xAl0．6Nb0．5Cu0．15B1．05Fe97．7-x合金微观结构和性能的影响冰
- 绵阳师范学院化学与化学工程学院,绵阳621000 中国工程物理研究院激光聚变研究中心,绵阳621900
- 绵阳师范学院化学与化学工程学院,绵阳,621000
- 中国工程物理研究院激光聚变研究中心,绵阳,621900
摘要: 经配料、熔炼、制粉、成型和烧结后制备了（PrNd）xAl0．6Nb0．5Cu0．15B1．05Fe97．7-x（质量百分比）合金，将该合金分别采用1．5GPa和3．0GPa的压强进行压制，研究了此高压对其显微结构和磁性能的影响．分析发现，该块状合金承受的压强越高，其外观和微观结构破坏越严重，抗弯强度也会降低，但高温抗氧化性能却有一定程度的提高．与没有经过高压处理的磁体相比，经过1．5GPa和3．0GPa高压的样品最大磁能积分别提高了7．69kJ．m^-1和0．94kJ．m^-1，剩余磁通密度分别提高了0．02T和0．01L内禀矫顽力分别提高了20．06kA．m-1和30．33kA．m^-1．结果表明，高压对块状NdFeB烧结磁体的显微结构和力学性能及磁性能均有一定的影响．
Effects of high pressure on microstructure and properties of bulk (PrNd)xAl0.6Nb0.5Cu0.15B1.05Fe97.7-x alloys
- 绵阳师范学院化学与化学工程学院,绵阳621000 中国工程物理研究院激光聚变研究中心,绵阳621900
- 绵阳师范学院化学与化学工程学院,绵阳,621000
- 中国工程物理研究院激光聚变研究中心,绵阳,621900
Keywords:
- NdFeB合金 /
- 高压 /
- 微观结构 /
- 性能
Abstract: According to nominal composition (PrNd)xAl0.6Nb0.5Cu0.15B1.05Fe97.7-x (weight percentage), the sintered NdFeB magnets are prepared by melting processing, milling processing, moulding processing and sintering processing. Microstructures and properties of these bulk samples at different high pressures are tested. It is shown that with pressure increasing, appearance and microstructure of samples are destroyed, but their inoxidizability at high temperature is increased, although their flexure strength is badly reduced. On the other hand, there are more excellent magnetic properties of bulk NdFeB samples pressed at high pressures (1.5 GPa and 3.0 GPa) than those of this bulk samples without being pressed. For example, values of their maximum magnetic energy products are increased by 7.69 kJ.m-3 and 0.94 kJ.m-3 respectively, and values of their remanence are increased by 0.02 T and 0.01 T respectively, in addition, the values of their intrinsic coercive force are increased by 20.06 kA.m-1 and 30.33 kA.m-1 respectively. It is ind that high pressure has some effects on microstructure, mechanical and magnetic property of the bulk NdFeB alloy.
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