Progress Through Research

R&D and Innovation in NdFeB Magnets

Our R&D work focuses on three closely linked areas: grain refinement, dual-alloys, and cerium-containing NdFeB materials. The following original images and evaluations are taken from the provided technical development material.

Grain Refinement

A finer and more uniform grain structure allows for targeted improvements in coercivity, temperature stability, and reproducibility. Development combines microstructure imaging, particle size distribution, and magnetic measurement data.

Gefügevergleich

Mikroskopische Vergleichsaufnahmen zeigen die Veränderung der Kornstruktur nach der Prozessoptimierung.

Partikelgrößenverteilung

Eine engere Pulververteilung unterstützt eine gleichmäßigere Verdichtung und ein reproduzierbares Sintergefüge.

Korngrenzenkontrolle

Feinkorn- und Korngrenzenstruktur werden gemeinsam bewertet, um lokale Schwachstellen zu reduzieren.

Magnetische Eigenschaften

Magnetische Eigenschaften

Future Development of Microstructure Control

1. Reduction of powder particle size: 2.8–3.0 μm → 2.6–2.8 μm → < 2.6 μm
2. Improvement of oxidation resistance in the manufacturing process
3. Optimization of the low-temperature sintering process

Future Development of Dual-Alloy Technology

1. Optimization of the additive alloy composition
2. Dual main phase combined with dual-alloy technology

Dual-Alloy

The dual-alloy process separates the production of the main and additive alloys. Both base materials are specifically designed and homogeneously mixed before the subsequent shaping and sintering stages.

Konventioneller Prozess

Eine Ausgangslegierung durchläuft Pulverherstellung, Pressen und Sintern.

Duallegierungsprozess

Haupt- und Zusatzlegierung werden separat hergestellt und anschließend kontrolliert zusammengeführt.

The separate design expands the scope for composition and grain boundary chemistry. This allows magnetic performance, temperature behavior, and raw material usage to be adapted to the respective application.

Cerium-containing NdFeB materials enable a broader use of available rare earth resources. Partial substitution must be coordinated with alloy design, microstructure, and heat treatment to ensure that the required magnetic properties are maintained.

Cerium-containing NdFeB Magnets

01

Raw Material Strategy
Cerium is specifically investigated as a component of resource-efficient NdFeB alloy concepts.

02

Phase and Microstructure Design
The composition and distribution of phases are tuned for stable magnetic behavior.

03

Process Coordination
Powder production, orientation, sintering, and heat treatment are optimized together.

Original image from R&D material