Enhancement of thermal stability of porous bodies comprised of stainless steel or an alloy

Bischoff, Brian L; Sutton, Theodore G; Judkins, Roddie R; Armstrong, Timothy R; Adcock, Kenneth D

Title: Enhancement of thermal stability of porous bodies comprised of stainless steel or an alloy

Full Record
Other Related Research

Abstract

A method for treating a porous item constructed of metal powder, such as a powder made of Series 400 stainless steel, involves a step of preheating the porous item to a temperature of between about 700 and 900.degree. C. degrees in an oxidizing atmosphere and then sintering the body in an inert or reducing atmosphere at a temperature which is slightly below the melting temperature of the metal which comprises the porous item. The thermal stability of the resulting item is enhanced by this method so that the item retains its porosity and metallic characteristics, such as ductility, at higher (e.g. near-melting) temperatures.

Inventors:

Bischoff, Brian L ^[1]; Sutton, Theodore G ^[2]; Judkins, Roddie R ^[1]; Armstrong, Timothy R ^[3]; Adcock, Kenneth D ^[4]

Knoxville, TN
Kingston, TN
Clinton, TN
Harriman, TN

Issue Date:: 2010-11-09

Research Org.:: Worldwide Energy, Inc. of Delaware (Oak Ridge, TN)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1014938

Patent Number(s):: 7829012

Application Number:: US Patent Application 11/305,974

Assignee:: Worldwide Energy, Inc. of Delaware (Oak Ridge, TN)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER

Show more

B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
B22F2201/013 - Hydrogen
B22F3/1121 - {by using decomposable, meltable or sublimatable fillers}
B22F3/1007 - {Atmosphere
B22F3/1146 - {After-treatment maintaining the porosity
B22F2998/00 - Supplementary information concerning processes or compositions relating to powder metallurgy
B22F2201/10 - Inert gases
B22F2998/10 - Processes characterised by the sequence of their steps
B22F2201/03 - Oxygen

Show less

DOE Contract Number:: AC05-00OR22725

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Citation Formats


                    Bischoff, Brian L, Sutton, Theodore G, Judkins, Roddie R, Armstrong, Timothy R, and Adcock, Kenneth D. Enhancement of thermal stability of porous bodies comprised of stainless steel or an alloy.  United States: N. p., 2010. 
        Web.

Copy to clipboard


                    Bischoff, Brian L, Sutton, Theodore G, Judkins, Roddie R, Armstrong, Timothy R, & Adcock, Kenneth D. Enhancement of thermal stability of porous bodies comprised of stainless steel or an alloy.  United States.

Copy to clipboard


                    Bischoff, Brian L, Sutton, Theodore G, Judkins, Roddie R, Armstrong, Timothy R, and Adcock, Kenneth D. Tue .  
        "Enhancement of thermal stability of porous bodies comprised of stainless steel or an alloy".  United States.  https://www.osti.gov/servlets/purl/1014938.

Copy to clipboard


                    
@article{osti_1014938,

  title        = {Enhancement of thermal stability of porous bodies comprised of stainless steel or an alloy},

  author       = {Bischoff, Brian L and Sutton, Theodore G and Judkins, Roddie R and Armstrong, Timothy R and Adcock, Kenneth D},

  abstractNote = {A method for treating a porous item constructed of metal powder, such as a powder made of Series 400 stainless steel, involves a step of preheating the porous item to a temperature of between about 700 and 900.degree. C. degrees in an oxidizing atmosphere and then sintering the body in an inert or reducing atmosphere at a temperature which is slightly below the melting temperature of the metal which comprises the porous item. The thermal stability of the resulting item is enhanced by this method so that the item retains its porosity and metallic characteristics, such as ductility, at higher (e.g. near-melting) temperatures.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2010},

  month        = {11}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

Articles comprising ferritic stainless steels

Patent Rakowski, James M.

An article of manufacture comprises a ferritic stainless steel that includes a near-surface region depleted of silicon relative to a remainder of the ferritic stainless steel. The article has a reduced tendency to form an electrically resistive silica layer including silicon derived from the steel when the article is subjected to high temperature oxidizing conditions. The ferritic stainless steel is selected from the group comprising AISI Type 430 stainless steel, AISI Type 439 stainless steel, AISI Type 441 stainless steel, AISI Type 444 stainless steel, and E-BRITE.RTM. alloy, also known as UNS 44627 stainless steel. In certain embodiments, the articlemore » « less
Full Text Available
Porous stabilized beds, methods of manufacture thereof and articles comprising the same

Patent Klausner, James F.; Mei, Renwei; Momen, Ayyoub Mehdizadeh; ...

Disclosed herein is a method comprising disposing a first particle in a reactor; the first particle being a magnetic particle or a particle that can be influenced by a magnetic field, an electric field or a combination of an electrical field and a magnetic field; fluidizing the first particle in the reactor; applying a uniform magnetic field, a uniform electrical field or a combination of a uniform magnetic field and a uniform electrical field to the reactor; elevating the temperature of the reactor; and fusing the first particles to form a monolithic solid.
Full Text Available
Porous stabilized beds, methods of manufacture thereof and articles comprising the same

Patent Klausner, James F.; Mei, Renwei; Momen, Ayyoub Mehdizadeh; ...

Disclosed herein is a method comprising disposing a first particle in a reactor; the first particle being a magnetic particle or a particle that can be influenced by a magnetic field, an electric field or a combination of an electrical field and a magnetic field; fluidizing the first particle in the reactor; applying a uniform magnetic field, a uniform electrical field or a combination of a uniform magnetic field and a uniform electrical field to the reactor; elevating the temperature of the reactor; and fusing the first particles to form a monolithic solid.
Full Text Available
(U,Zr)N alloy having enhanced thermal stability

Patent Potter, Ralph A [Lynchburg, VA]; Scott, James L [Knoxville, TN]

A nitrided alloy of uranium and zirconium is provided which consists of a single-phase UN structure containing a dissolved amount of Zr as ZrN, effective to inhibit dissociation of the UN phase.
Full Text Available
Li.sub.2 O-Al.sub.2 O.sub.3 -SiO.sub.2 glass ceramic-aluminum containing austenitic stainless steel composite body and a method of producing the same

Patent Cassidy, Roger T [Monroe, OH]

The present invention relates to a hermetically sealed Li.sub.2 O-Al.sub.2 O.sub.3 -SiO.sub.2 glass ceramic-aluminum containing stainless steel composite body and a method of producing the body. The composite body includes an oxide interfacial region between the glass ceramic and metal, wherein the interfacial region consists essentially of an Al.sub.2 O.sub.3 layer. The interfacial Al.sub.2 O.sub.3 region includes constituents of both the metal and glass ceramic.
Full Text Available

Similar Records