Pressureless sintering of iron aluminides

Pressureless sintering of iron aluminides

Forming processes discussed and coiq~iuiscm methods. Resonanr Effect of lubrication on densification of PM C steels in cold deformation and elec...

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Forming processes

discussed

and coiq~iuiscm

methods.

Resonanr

Effect of lubrication on densification of PM C steels in cold deformation

and elecrrical

cm cold deforma-

tion of 85% dense sintered O.$%C of 0.25,

0.5 and 0.75.

lubricant

were uzd.

tion crack

Fe-0.4%C

steels was Investigated

parts, described.

al&i1

M(oS, and no

It was shown that luhrica-

lateral

deformation

and

delayed

Lower aspect rates

inrtiation.

more irrespective

of lubrrcant

for densi~cati~~n

were deduced

order polynomi&

cd and correlated

methods

The

re-

were evatuat-

rvith metallographlc

itudics.

and Fe-

for aspect ratioh

Graphite,

and

their use to detect cracks and denhity gradients, m green and smtered

effects of lubncation

eddy current

reaisti\rity were cons&red

bsults from the diffcrrnt The

wa5 m‘ldr between

inspection,

Processing of aluminides Tape casting powders

of iron a~uminide

dens&d

used. Equation> to be second

with coefficients

related

c~~rn~~~siti(.ln,aspect ratio and lubricant

to

used.

Hot isostatic pressing of pre-hot-pressed tungsten silicide Application

of W silicide f&m in elcctromc

devices was noted, productinn vapcxkr deposition

being by physical

from sintered W-53 targets. It

was shown that the films may be contaminated with W-5

density

targets

pressed pre-forms. conditions target

sintering

of iron

particle sputtered off rhe target mate-

rials. This was shown to be avoidable high

Pressureless aluminides

made

by use of from

hot

A study of effects nf pnxess

was described.

materials

by HIP

Hot ~r~ssin~HIp

was reported

to allow

of

larger

areas of se~~i~~)nduct~~rmaterials To be ccyared.

Fe alumlnldes

srudie5 of pres5ureie55

sintcring

and elemental

of

of prc-all~)yed

were described. on powder Synrhebts exammed

Single stage water debinding injection moulded iron alloys

were d~sc~rsxxi with regard to

pr
characteri\tlcs

hehaviour

and green

of FeAl from elrmenral ;d

found

ro depend

rate, which ala> influenced

Fc-Al

depended density.

p
\inrered density.

Self-propagating high temperature synthesis of a ternary aluminide A mechcbd ior aqueous solvent Fe parts was introduced. tion and function

dehindmg

Structural

of the hinder

discussed with reference

of

composl-

system were

to avoiding oxidation.

Flaw detection Ultrasonic tomographic image reconstruction of metal powder compacts It was reported that ultrasonic

tomographic

image re~(-)nst~~ti(~n had heen us.4 to produce three-dimensmnal compacts and

density

described

images

to determine gradlcnts.

and involves

three orientations. using finite eIement a5say. Further

c>f green

the presence The scanning

powder of defects

technique

was

the sample

in

The results were evaluated m~~deIlin~ and destructive

studies were outlined.

Comparison of nondestructive detection methods in PM

Alloying and coating flaw

Manufacture and properties molybdenum-rhenium alloys

of

i).FxWlk~Ct .%I il ‘1>112’1 \if\ ,J{.-tp&J \, klki. kiki. C;zmINlY 1

www.metal-powder.net

MPR

June 2001

39