Oxide-dispersion strengthening of porous powder metalurgy parts
Patent
·
OSTI ID:874358
- Knoxville, TN
Oxide dispersion strengthening of porous metal articles includes the incorporation of dispersoids of metallic oxides in elemental metal powder particles. Porous metal articles, such as filters, are fabricated using conventional techniques (extrusion, casting, isostatic pressing, etc.) of forming followed by sintering and heat treatments that induce recrystallization and grain growth within powder grains and across the sintered grain contact points. The result is so-called "oxide dispersion strengthening" which imparts, especially, large increases in creep (deformation under constant load) strength to the metal articles.
- Research Organization:
- LOCKHEED MARTIN ENERGY RES COR
- DOE Contract Number:
- AC05-96OR22464
- Assignee:
- U. T. Battelle, LLC (Oak Ridge, TN)
- Patent Number(s):
- US 6375705
- OSTI ID:
- 874358
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/75/419/
articles
casting
constant
contact
conventional
creep
deformation
dispersion
dispersoids
elemental
especially
etc
extrusion
fabricated
filters
followed
forming
grain
grain growth
grains
growth
heat
heat treatment
imparts
incorporation
increases
induce
isostatic
load
metal
metal article
metallic
metallic oxide
metalurgy
oxide
oxide-dispersion
oxides
particles
porous
powder
pressing
recrystallization
result
sintered
sintering
so-called
strength
strengthening
techniques
treatments
articles
casting
constant
contact
conventional
creep
deformation
dispersion
dispersoids
elemental
especially
etc
extrusion
fabricated
filters
followed
forming
grain
grain growth
grains
growth
heat
heat treatment
imparts
incorporation
increases
induce
isostatic
load
metal
metal article
metallic
metallic oxide
metalurgy
oxide
oxide-dispersion
oxides
particles
porous
powder
pressing
recrystallization
result
sintered
sintering
so-called
strength
strengthening
techniques
treatments