Joan E Deffeyes

Title: Joan E Deffeyes: Innovator in Protective Coating Systems

Introduction

Joan E Deffeyes is a notable inventor based in St. Louis, MO (US). She has made significant contributions to the field of materials science, particularly in the development of protective coating systems for metal substrates. Her innovative approach has led to advancements that enhance the durability and cost-effectiveness of coatings.

Latest Patents

Joan E Deffeyes holds a patent for a method titled "Method for forming in situ diffusion barrier while diffusing aluminum." This patent describes an improved protective coating system that utilizes nickel-aluminide duplex coatings. The innovation involves adding an effective amount of boron during the nickel coating step and retaining it during the aluminization process. An unexpected benefit of this method is the non-deleterious effect of retained boron on oxidation protection. During the aluminization phase, boron migrates to the coating/substrate interface, forming a diffusion barrier in situ. This barrier effectively inhibits both inward diffusion of the nickel-aluminide coating and outward diffusion of substrate impurities. The process allows for the creation of thinner and less expensive coatings.

Career Highlights

Throughout her career, Joan has demonstrated a commitment to advancing materials technology. Her work has not only contributed to the field but has also paved the way for further research and development in protective coatings.

Collaborations

Joan has collaborated with notable colleagues, including Douglas J Peterman and James E O'Neal. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.

Conclusion

Joan E Deffeyes is a pioneering inventor whose work in protective coating systems has made a lasting impact on materials science. Her innovative methods continue to influence the industry, showcasing the importance of research and development in creating effective solutions.