FeCrCo/MnGa纳米复合材料是一种节约贵金属、环保型、具有较高的理论磁能积和力学性能，可实现新一代动力系统的关键永磁材料。本项目拟采用累积叠轧与强磁场相结合的新手段，实现FeCrCo合金与MnGa合金颗粒的叠轧复合，以强磁场控制热处理环节中合金的相变过程。研究解决FeCrCo/MnGa复合材料磁交换耦合的关键问题: 1) FeCrCo合金调幅分解硬磁粒子的生长形态和取向的控制，使铁磁性粒子沿<001>易磁化方向规则排列；2) MnGa合金退火新生相的形态、尺度与成分的控制，使硬磁相沿相同方向取向排列。3) 热处理过程中FeCrCo与MnGa晶粒粗化以及有害相的抑制。获得纳米尺度的软磁相与硬磁相规则间隔排列的磁交换耦合结构，从而开发一种高性能、新型纳米晶复相永磁材料及其制备方法，为新一代动力系统的开发提供关键永磁材料。

High performance Fe-base permanent magnetic material is the key technology to the implementation of new generation dynamic systems, and it is also benefit to save noble metal and rare earth. FeCrCo and MnGa powders were used in this project to form a composite by Accumulative Roll Bonding technique. We will then anneal the composites under high magnetic fields to promote the formation of the desirable intermetallic compounds in MnGa alloys and textured composite. The high magnetic field is used to improve the magnetic properties though altering microstructure by three mechanisms: (1) Refinement and preferred orientation growth of hard magnetic particles under spinodal decomposition, <001> texture in FeCrCo alloys is promoted; (2) morphology, size , Composition and magnetic property of compounds formed in MnGa layer, the alignment of compound phase in same direction; (3) Prevention of grain growth coarsening, Inhibition of undesired phase content during heat treatment. The project will aim to fabricate FeCrCo/MnGa permanent magnetic nanomaterial with high magnetic and mechanical performance, and to develop a new method of magnetic nanomaterial fabrication.