Tetsuhito Yoneyama

Title: Tetsuhito Yoneyama: Innovator in Permanent Magnet Materials

Introduction

Tetsuhito Yoneyama is a notable inventor based in Ichikawa, Japan. He has made significant contributions to the field of permanent magnet materials, holding a total of 2 patents. His work focuses on enhancing the properties of rare earth-cobalt magnets, which are crucial for various technological applications.

Latest Patents

Yoneyama's latest patents include innovations in the composition of permanent magnet materials. The first patent, titled "R.sub.2 Co.sub.17 Rare type-earth-cobalt, permanent magnet material," discloses the addition of at least two elements from Nb, V, Ta, and Zr to the ternary alloy of R (rare earth)-Co-Cu. This addition aims to provide permanent magnets with increased coercive force, residual magnetization, and energy product. The second patent, "Permanent magnet material and process for producing the same," similarly emphasizes the benefits of incorporating these additional elements, allowing for Cu and Fe contents of the alloy to be less than 10% and more than 6%, respectively. These adjustments were previously avoided in the prior art to prevent reductions in Br and Hc.

Career Highlights

Tetsuhito Yoneyama is currently associated with TDK Electronics Company, Limited, where he continues to innovate in the field of magnet materials. His expertise and research have positioned him as a key figure in the development of advanced permanent magnets.

Collaborations

Yoneyama has collaborated with notable colleagues such as Tetsuo Hori and Teruhiko Ojima. Their combined efforts contribute to the ongoing advancements in the field of magnet technology.

Conclusion

Tetsuhito Yoneyama's work in permanent magnet materials showcases his innovative spirit and dedication to enhancing technology. His patents reflect a deep understanding of material science and its applications in modern technology.