Microstructure Comparison
Comparative micrographs show how the grain structure changes after process optimization.
PROGRESS THROUGH RESEARCH
Innovation
R&D and Innovation in NdFeB Magnets
R&D and Innovation in NdFeB Magnets
Our R&D work focuses on three connected areas: grain refinement, dual-alloy processing, and cerium-containing NdFeB materials. The original micrographs, process diagrams, product photographs, and measurement results below are taken from the supplied technical development material.
Microstructure Development
Grain Refinement
A finer and more uniform grain structure supports targeted improvements in coercivity, temperature stability, and process consistency. Development combines microstructure imaging, particle-size analysis, and magnetic-property measurements.
Particle-Size Distribution
A narrower powder distribution supports more uniform compaction and a repeatable sintered structure.
Grain-Boundary Control
Fine grains and boundary structures are evaluated together to reduce local weak points.
Magnetic Properties
Br, Hcj, and energy product are correlated with the corresponding process and microstructure data.
Future Development of Microstructure Control
- Reduction of powder particle size: 2.8–3.0 μm → 2.6–2.8 μm → < 2.6 μm
- Improvement of oxidation resistance throughout the manufacturing process
- Optimization of the low-temperature sintering process
Future Development of Dual-Alloy Technology
- Optimization of the auxiliary-alloy composition
- Dual main-phase design combined with dual-alloy technology
Process and Alloy Development
Dual-Alloy Processing
The dual-alloy process separates the production of the main alloy and an auxiliary alloy. Both starting materials are designed independently and then blended uniformly before the subsequent forming and sintering stages.
Conventional Process
One starting alloy passes through powder preparation, pressing, and sintering.
Dual-Alloy Process
The main and auxiliary alloys are produced separately and combined under controlled conditions.
Independent alloy design increases flexibility in composition and grain-boundary chemistry, allowing magnetic performance, temperature behavior, and raw-material use to be balanced for the target application.
Resource-Efficient Materials
Cerium-Containing NdFeB Magnets
Cerium-containing NdFeB materials enable broader use of available rare-earth resources. Partial substitution must be coordinated with alloy design, microstructure, and heat treatment so that the required magnetic properties are maintained.
Raw-Material Strategy
Cerium is evaluated as part of resource-efficient NdFeB alloy concepts.
Phase and Microstructure Design
Phase composition and distribution are tuned for stable magnetic behavior.
Process Alignment
Powder preparation, alignment, sintering, and heat treatment are optimized as one process chain.
Developing a demanding magnetic application?
We support material selection, microstructure engineering, magnet design, and simulation-led development.