Company Filing History:
Years Active: 1977-1987
Title: Marvin J. Stern: Innovator in Nickel Base Brazing Alloys
Introduction
Marvin J. Stern is a notable inventor based in Seattle, WA, recognized for his contributions to the field of materials science, particularly in the development of nickel base brazing alloys. With a total of 5 patents to his name, Stern has made significant advancements that enhance the performance and reliability of superalloys used in various high-temperature applications.
Latest Patents
Stern's latest patents include innovative formulations of nickel base brazing alloys. One of his key inventions is a nickel base brazing alloy specifically designed for diffusion brazing of superalloys, including gamma prime nickel base superalloys. This improved brazing alloy consists of 12 to 14% chromium, 1 to 3.5% boron, 1.5 to 5% iron, less than 0.06% carbon, and the balance nickel. This alloy is capable of filling gaps in brazed joints up to 0.02 inches without compromising the joint microstructure. The resulting microstructure exhibits minor secondary phases of ultrafine spherical precipitates within a solid solution matrix, leading to enhanced ductility and resistance to high-temperature oxidation and sulfidation.
Another significant patent by Stern is a nickel base diffusion brazing alloy suitable for brazing gamma and gamma prime strengthened superalloys at temperatures as low as 2150°F. This alloy comprises 12 to 14% chromium, 2 to 4% tantalum, 2.5 to 4% boron, 0.01 to 0.06% yttrium, 2.5 to 5% aluminum, less than 0.03% carbon, and the balance nickel, along with incidental impurities. The preferred composition includes 12.5 to 13.5% chromium, 2 to 4% tantalum, 2.5 to 3.5% boron, 0.01 to 0.03% yttrium, 3.5 to 4.5% aluminum, and less than 0.03% carbon, ensuring optimal performance in demanding applications.
Career Highlights
Marvin J. Stern is currently associated with Alloy Metals, Inc., where he continues to innovate and develop advanced materials for various industrial applications. His work has significantly impacted the field