Abstract
The direct current potential drop method (DCPD) has been applied to four differently shaped green bodies made of iron based powders. The density and porosity has been measured in the bodies and correlated with potential drop. When the porosity is well known, a good correlation between potential drop and porosity is found. By comparison with literature it is concluded that the potential drop in green bodies varies more with porosity than in sintered bodies.
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References
1.ASM handbook’, Vol . 7, 302-309; 1994, Materials Park, OH, ASM International.
2.
Lewis
A.
: in ‘Prevention and detection of cracks in ferrous P/M parts’ ; 1988 , Princeton, NJ , MPIF .
3.
Litukkonen
P.
and
ERICSSON
T.
Powder Metall ., 2003 , 46 , 329 .
4.
German
R. M.
: ‘Powder metallurgy of iron and steel’; 1998, New York, NY, J. Wiley and Sons.
5.
RouQutt
S.
: ‘Influence of porosity on the potential drop using the DCPD method (direct current potential drop)’, LiTH-IKP-Ex-1741, LinkOpings Universitet, August 2000.
6.
Valdes
L. B.
: Proc. Conf. IRE, 420-427 , 1954 .
7.
Hjortsberg
E.
: ‘PM2000: world congress on powder metallurgy'; 2000, Kyoto, JPMA.
8.
Bos
B. Van Den
: ‘The DC potential drop method for NDT of green and sintered P/M components’, Lic. Thesis No. 523, Linkoping Studies in Science and Technology , 1995 .
9.
Rice
R. W.
: ‘Porosity of ceramics’ ; 1998 , New York, NY , Marcel Dekker .
10.
Simchi
A.
,
DANNINGER
H.
and
WEISS
B.
Powder Metall ., 2000 , 43 , (3 ), 219 –227 .