David Charles Deleeuw

Title: David Charles Deleeuw: Innovator in Silicon Carbide Fibers and Yield Stress Measurement

Introduction

David Charles Deleeuw is a notable inventor based in Midland, MI (US). He has made significant contributions to the field of materials science, particularly in the development of silicon carbide fibers and methods for measuring yield stress in various fluids. With a total of 2 patents, his work has implications for high-temperature applications and product formulation.

Latest Patents

One of Deleeuw's latest patents is focused on the preparation of substantially polycrystalline silicon carbide fibers. This innovative process involves forming fibers from a preceramic polymeric precursor, specifically methylpolysilane resins. The fibers are designed to be thermally stable at high temperatures and are infusibilized to prevent melting. The process includes a pyrolysis step where the fibers are heated to temperatures exceeding 1600°C in a nonoxidizing atmosphere, resulting in fibers with at least 75% crystallinity and a density of approximately 2.9 gm/cm³. Additionally, the incorporation of boron into the fibers enhances their properties, which can occur at various stages of the fiber formation process.

Another significant patent by Deleeuw pertains to the method of measuring yield stress in rheologically plastic fluids, such as coatings and personal care lotions. This method determines the tendency of these fluids to flow under low gravitational stress. An on-line technique was developed to monitor yield stress during processing, which aids in controlling the behavior of these products. The residual stress measured after a flow excursion can be utilized for effective process monitoring.

Career Highlights

David Charles Deleeuw is currently employed at Dow Corning Corporation, where he continues to innovate and contribute to advancements in materials science. His work has positioned him as a key figure in the development of high-performance materials.

Collaborations

Throughout his career, Deleeuw has collaborated with notable colleagues, including Neal Roger Langley and Jonathan Lipowitz. These collaborations have further enriched his research and development efforts.

Conclusion

David Charles Deleeuw's contributions to the fields of silicon carbide fibers and yield stress measurement highlight his innovative spirit and dedication to advancing materials science. His patents reflect a commitment to developing technologies that enhance performance in various applications.