The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 2021
Filed:
Oct. 16, 2019
Case Western Reserve University, Cleveland, OH (US);
Zhe Ren, Cleveland, OH (US);
Frank Ernst, Cleveland, OH (US);
CASE WESTERN RESERVE UNIVERSITY, Cleveland, OH (US);
Abstract
A carburization method for steel is contemplated, with austenitic stainless steel showing particular promise. The surface is first passivated with an acidic solution and then subjected to low temperature (between ˜350 to 550° C. or between ˜650 to 1,000° F.) carburization in the presence of a concentrated carbon solution (e.g., carbon monoxide, hydrogen gas, and nitrogen gas), followed by a repeated cycle of passivation and carburization under identical conditions but for a comparatively shorter period of time relative to the first cycle. The carburized surface is allowed to cool and cleaned, after which the resulting surface is shown to have ultrahigh tensile strength, increased interatomic bonding strength, and lowered electrical and thermal conductivity. To the extent this method can be employed to completely saturate and penetrate the workpiece (e.g., a foil), the resultant material and article are formed entirely from a novel composition.