Abstract
Specimens of WC–30Co and WC–1VC–30Co (wt-%) were heat treated at 1500°C for up to 64 h. During the early stage of heat treatment, it was observed that the addition of VC has effectively retarded the coarsening of WC grains. After the prolonged heat treatment, however, the abnormally grown, very large WC grains appeared in the WC–1VC–30Co specimen. The role of VC has been interpreted in terms of grain coarsening which is suggested to occur by a two-dimensional nucleation mechanism.
Get full access to this article
View all access options for this article.
References
1.
Spriggs
G. E.
: Int. J. Met. Hard Mater ., 1995 , 13 , 241 –255 .
2.
Bock
A.
,
SCHUBERT
W. D.
, and
LUX
B.
Powder Metall. Ind ., 1992 , 24 , 20 –26 .
3.
McCANDLISH
L. E.
,
Kear
B. H.
, and
KIM
B. K.
Mater. Sci. Technol ., 1991 , 6 , 953 –956 .
4.
Kim
B. K.
,
HA
G. H.
, and
LEE
D. W.
J. Mater. Process. Technol ., 1997 , 63 , 317 –321 .
5.
Greenwood
G. W.
: Acta Metall ., 1956 , 4 , 243 –248 .
6.
Ardell
A. J.
: Acta Metall ., 1972 , 20 , 61 –71 .
7.
Vengrenovitch
R. D.
: Acta Metall ., 1982 , 30 , 1079 –1086 .
8.
Hennings
D. F. K.
,
JANSSEN
R.
, and
REYNEN
P. J. L.
J. Am. Ceram. Soc ., 1987 , 70 , 23 –27 .
9.
Yoo
Y.-S.
,
KIM
H.
, and
KIM
D.-Y.
J. Euro. Ceram. Soc ., 1997 , 17 , 805 –811 .
10.
Kang
S.-J. L.
and
HAN
S.-M.
Mater. Res. Bull ., 1995 , 20 , 33 –37 .
11.
Rhee
S.-H.
,
LEE
J. D.
, and
KIM
D.-Y.
Mater. Lett ., 1997 , 32 , 115 –120 .
12.
Chol
G. R.
: J. Am. Ceram. Soc ., 1971 , 54 , 34 –39 .
13.
Yoon
H.-H.
and
KIM
D.-Y.
Mater. Lett ., 1994 , 20 , 293 –297 .
14.
Heuer
A. H.
,
FRYBURG
G. A.
,
OGBUJI
L. U.
,
MITCHELL
T. E.
, and
SHINOZAKE
S.
J. Am. Ceram. Soc ., 1978 , 61 , 406-412 , 412 –413 .
15.
Fagan
J. G.
and
AMARAKOON
V. R. W.
J. Mater. Res ., 1993 , 8 , 1501 –1509 .
16.
Jeong
I.-K.
,
KIM
D.-Y.
,
KHIM
Z. G.
, and
KWON
S. J.
Mater. Lett ., 1989 , 8 , 91 –94 .
17.
Song
H. S.
and
COBLE
R. L.
J. Am. Ceram. Soc ., 1990 , 73 , 2077 –2085 .
18.
Seabaugh
M. M.
,
KERSCHT
I. H.
, and
MESSING
G. L.
J. Am. Ceram. Soc ., 1997 , 80 , 1181 –1188 .
19.
Prochazka
S.
,
DOLE
S. L.
, and
HEJNA
C. I.
J. Am. Ceram. Soc ., 1985 , 68 , C235–C236.
20.
Hong
S. H.
and
MESSING
G. L.
J. Am. Ceram. Soc ., 1998 , 81 , 1269 –1277 .
21.
Park
Y. J.
,
HWANG
N. M.
, and
YOON
D. N.
Metall. Mater. Trans ., 1996 , 27A , 2809 –2819 .
22.
Kang
M.-K.
,
YOO
Y.-S.
,
KIM
D.-Y.
, and
HWANG
N. M.
J. Am. Ceram. Soc. ,200, 83 , 385 –390 .
23.
Herring
C.
: J. Appl. Phys ., 1950 , 21 , 301 –303 .
24.
Kim
D.-Y.
and
ACCARY
A.
Mater. Sci. Res ., 1980 , 13 , 235 –244 .
25.
Jaroenworaluck
A.
,
YAMAMOTO
T.
,
IKUHARA
Y.
, and
SAKUMA
T.
J. Mater. Res ., 1998 , 13 , 2450 –2452 .
26.
Shatov
A. V.
,
FIRSTOV
S. A.
, and
SHATOVA
I. V.
Mater. Sci. Eng ., 1998 , A242 , 7 –14 .
27.
Exner
H. E.
: Int. Met. Rev. , 1979 , (4) , 149 –173 .
28.
Thomson
C. V.
,
FROST
H. J.
, and
SPAEPEN
F.
Acta Metall ., 1987 , 35 , 887 –890 .
29.
Kwon
S.-K.
,
HONG
S.-H.
,
HWANG
N. M.
, and
KIM
D.-Y.
J. Am. Ceram. Soc., in press.
30.
Markov
I. V.
: ‘Crystal growth for beginners: fundamentals of nucleation, crystal growth, and epitaxy’ , 1995 , London , World Scientific Co .
31.
Hewe
J. M.
: ‘Interfaces in Materials’ , 1997 , New York, NY , Wiley .
32.
Kang
M.-K.
: PhD thesis, Seoul, Seoul National University , 1999 .