Porous metallic bodies

Patent · Tue Jan 01 04:00:00 EST 1985

OSTI ID:865714

Landingham, Richard L ^[1]

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1. Livermore, CA

Porous metallic bodies having a substantially uniform pore size of less than about 200 microns and a density of less than about 25 percent theoretical, as well as the method for making them, are disclosed. Group IIA, IIIB, IVB, VB, and rare earth metal hydrides are heated in a confining container at a controlled rate to a temperature of about greater than the temperature at which the hydride decomposes. Hydrogen is removed from the container and the remaining metal is heated during a second stage to a temperature greater than the temperature at which it was previously heated but not greater than the temperature of 1/2 to 2/3 the temperature at which the metal melts at a controlled rate. The resulting porous metallic body produced has a density less than about 25 percent theoretical and a pore size of less than about 200 microns. The metallic particles of the present invention have high inner surface area and possess minimum resistance to gas flow.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4560621
• OSTI ID: 865714
• Country of Publication: United States
• Language: English

Related Subjects

/428/75/419/
200
25
bodies
confining
container
controlled
controlled rate
decomposes
density
disclosed
earth
earth metal
flow
gas
gas flow
heated
hydride
hydrides
hydrogen
iia
iiib
inner
inner surface
ivb
melts
metal
metal hydride
metal hydrides
metal melt
metal melts
metallic
metallic bodies
metallic particles
method
microns
minimum
particles
percent
percent theoretical
pore
pore size
porous
porous metal
porous metallic
possess
previously
produced
rare
rare earth
rate
remaining
removed
resistance
resulting
size
stage
substantially
substantially uniform
surface
temperature
theoretical
uniform
uniform pore
vb