- Email: [email protected]
Issues in sintering science and technology
6
Conference Io -
-
~ ~ pproceed
and sintering
It was reported Co, Ni, W, Tic, properties
a cermet
and mechanical
were investigated. method
counter
material.
severe
wear
Explanations
containing
TiN and WC had been made
by a pin-on-disc
Wear tests were using WC
The transition regimes
as the
from mild to identified.
was
of the wear mechanisms
were
The
opinion
theories,
Mechanical properties of cobalt base matrix alloys for diamond impregnated tools H.Frydrych et al. (University of Mmlng and Metallurgy,
powders,
had been made by gas
The atomized powders were dis-
cracow, Poland.) Mechanical
propertfes
of matrix
alloys for
bonded diamond tools were discussed with ref-
longer valid. Properties ture of additives considered,
was presented.
Zr into the powders. The gels so formed were
Co-Fe and WC-Co
washed, dried, crushed
ples,
which
and fired to powder,
was characterized.
pressed and sintered. tionships
for
the
The
powders were
Structure/property sintered
rela-
materials
Microstructure and prop&ties of titanium carbonitride base ceramics A.Bellos~ et al. (CNR-IRTEC:, Faenza, Italy.) Production
of Ti(C,N)
Starting
WC-5%Co,
base materials
materials
Ni and Co. Structures
erties were investigated positions
were
and
processing
grains of Ti(C,N) (Ti,W)(C,N).
of com-
conditions.
Core
were found to have a rim of
Presence
(Ni,Co)ZTi(W)
was
TiCN,
and prop-
as functions
binder
phase.
Without
Properties correlated with performance
were interpreted
in terms of
teristics under service conditions.
The use of computed in
tomography
a ceramic
in study
was
discussed.
Assumptions
were made concerning
chemical
homogeneity
of the sample and attenuation
of
in the use of rare earth including
Sm-Co,
Zr) and
particularly
Fe, Cu,
alloys,
sintered
types, for a wide range of
and polymer
bonded
was noted. In the case of Nd-Fe-
B the trend is towards higher values of BHIIIPx. of
Comparison
NdZFe14B
was made
was
between
reviewed. NdzFe14B
and PrzFe14B in terms of liquid phase sintering of both
materials.
earth magnets
mm in diameter
costs and performance.
www.metal-Dowder.net
UK.)
applications Sintering
Future
and
solid phase sintering
Starting
from a three-dimena Voronoy-mosaic,
grain boundary movement pore shrinkage
was calculated
for
for pores at grain corners,
grain boundaries
and within
tions. Results were presented
grains.
in
In the
trends
in rare
were discussed with regard to
graphically.
Gravitational effects on compact shaping and structural evolution in liquid phase sintering A.Ugadhaya, R.M.German. Umwrsity, USA.) Liquid phase sintering reference
to
effects
respect of structural
(Pennsyluama
State
was discussed
with
caused stability,
by gravity
during ter-
It was shown that sintering allowed a much wider range
ratios to be used. Experiments
W heavy alloys under micrograv-
ity conditions, were
in
net shaping and
the need for high solids contents
in sintering
permanent
Sm-(Co,
Nd-Fe-B
for grain growth
microstructure,
of solid:liquid
(LJnlversrty ofBirmin&am. Birmqham,
magnets,
and
during
in microgravity
Sintered rare earth permanent magnets
X-rays. It was reported that samples up to 100 had been examined.
sional
model
restrial sintering.
Growth
R.Rudert, T.Rabe. (Federal Inst.for Marenab Research and Testing, Berlin, Germany.)
posed by this gap.
three cases grains are allowed to change posi-
7th International Conference on Sintering. The following Abstracts &of papers pmsented at Sintering 2000, which was held in Ney Delhi, India, in February 2000. For further details cantact Pmf, G.S. Upadbyaya, Dept of Materials and MetaUurgkal Engineering, Indian Institute of Technology, Kanpur %1&&6~ India; tel: +91-512.597624; fax: +91-512-590260, email: gsuWtk.ac.in.
R.Hatis.
Non-destructive porosity determination in materials by computed tomography
porosity
charac-
a
microstructure.
of
was described.
of a metal produced a
binder phase hardness was high and toughness low. Properties
pressing,
were
determined.
described.
made by hot
sam-
It was noted that
factors have given impetus
A computer
ties of Co, Co-Cu-Sn,
proper-
was
there is a gap between
G.Tomandl, P.Varkoly. (Society for Software Systems, Numberg, Germany.)
of the tools. An investi-
containing
struc-
sintering
Threedimensional computer modelling of grain growth and pore shrinkage during sintering
and tribological
solution
ions to introduce
sintering
were said to be more
sintering theory and practice.
gation of mechanical
aqueous
that
models, are no
in activating
although
erence to applications
and Zr(IV)
and
accurately known. The role of electronic
Al and
in an
Al(II1)
was expressed
based on two-particle
pore shrinkage
persed
science
(Indian Inst. of Technology,Kanpur,
G.S.Upadhyaya. l&l.)
to the challenge
of
that hard metal
Issues in sintering technology
techno-economic
given.
M.Rosso et al. (Polirecnrco di Tonno, Tonno, Italy.)
atomization.
that
by a PM route. Tribological
powders
based on Ni-Cr-B-FeC,
of a
G.de Porru. (CNR-IRTEC, Faenza, Italy.)
nickelchromium-boron-alumina-
It was reported
Conterence on
SinteringandRoPMzooo.
Mechanical and wear properties tough cermet material
from papers presented at the iggg EuropeanConferenceon Advances in Hard Materials Production and International Workshop on Diamond Tool Production held in Turin, Italy. in November 1999. For further details contact the EPMA: Old Bank Buildings, Bellstone, Shrewsbury, !%l NU,UK;tel.: +@-1743-2488~;fiW +44-1743-362968; e-mail: [email protected]. .
zirconia composite
EURO’PM 99, the 7th International
1 ngs
EURO’PM gg. The following Abstracts are
Synthesis
Featuring selected abstracts from the Proceedings of
during
reported.
macrostructural
space-shuttle
Results evolution
with microgravity
flights,
showed effects
novel
associated
sintering.
Computer-aided microstructural sintering
control of evolution during
I’.C.Kapur et al. (Tata Research, Development and Design Cenrre, Pune, India.) The importance during structure
sintering
of microstructural
control
was
Micro-
is influenced
MPR
emphasized.
by material and process
Februarv
2001
39
Conference Io -
-
~ ~ pproceed
and sintering
It was reported Co, Ni, W, Tic, properties
a cermet
and mechanical
were investigated. method
counter
material.
severe
wear
Explanations
containing
TiN and WC had been made
by a pin-on-disc
Wear tests were using WC
The transition regimes
as the
from mild to identified.
was
of the wear mechanisms
were
The
opinion
theories,
Mechanical properties of cobalt base matrix alloys for diamond impregnated tools H.Frydrych et al. (University of Mmlng and Metallurgy,
powders,
had been made by gas
The atomized powders were dis-
cracow, Poland.) Mechanical
propertfes
of matrix
alloys for
bonded diamond tools were discussed with ref-
longer valid. Properties ture of additives considered,
was presented.
Zr into the powders. The gels so formed were
Co-Fe and WC-Co
washed, dried, crushed
ples,
which
and fired to powder,
was characterized.
pressed and sintered. tionships
for
the
The
powders were
Structure/property sintered
rela-
materials
Microstructure and prop&ties of titanium carbonitride base ceramics A.Bellos~ et al. (CNR-IRTEC:, Faenza, Italy.) Production
of Ti(C,N)
Starting
WC-5%Co,
base materials
materials
Ni and Co. Structures
erties were investigated positions
were
and
processing
grains of Ti(C,N) (Ti,W)(C,N).
of com-
conditions.
Core
were found to have a rim of
Presence
(Ni,Co)ZTi(W)
was
TiCN,
and prop-
as functions
binder
phase.
Without
Properties correlated with performance
were interpreted
in terms of
teristics under service conditions.
The use of computed in
tomography
a ceramic
in study
was
discussed.
Assumptions
were made concerning
chemical
homogeneity
of the sample and attenuation
of
in the use of rare earth including
Sm-Co,
Zr) and
particularly
Fe, Cu,
alloys,
sintered
types, for a wide range of
and polymer
bonded
was noted. In the case of Nd-Fe-
B the trend is towards higher values of BHIIIPx. of
Comparison
NdZFe14B
was made
was
between
reviewed. NdzFe14B
and PrzFe14B in terms of liquid phase sintering of both
materials.
earth magnets
mm in diameter
costs and performance.
www.metal-Dowder.net
UK.)
applications Sintering
Future
and
solid phase sintering
Starting
from a three-dimena Voronoy-mosaic,
grain boundary movement pore shrinkage
was calculated
for
for pores at grain corners,
grain boundaries
and within
tions. Results were presented
grains.
in
In the
trends
in rare
were discussed with regard to
graphically.
Gravitational effects on compact shaping and structural evolution in liquid phase sintering A.Ugadhaya, R.M.German. Umwrsity, USA.) Liquid phase sintering reference
to
effects
respect of structural
(Pennsyluama
State
was discussed
with
caused stability,
by gravity
during ter-
It was shown that sintering allowed a much wider range
ratios to be used. Experiments
W heavy alloys under micrograv-
ity conditions, were
in
net shaping and
the need for high solids contents
in sintering
permanent
Sm-(Co,
Nd-Fe-B
for grain growth
microstructure,
of solid:liquid
(LJnlversrty ofBirmin&am. Birmqham,
magnets,
and
during
in microgravity
Sintered rare earth permanent magnets
X-rays. It was reported that samples up to 100 had been examined.
sional
model
restrial sintering.
Growth
R.Rudert, T.Rabe. (Federal Inst.for Marenab Research and Testing, Berlin, Germany.)
posed by this gap.
three cases grains are allowed to change posi-
7th International Conference on Sintering. The following Abstracts &of papers pmsented at Sintering 2000, which was held in Ney Delhi, India, in February 2000. For further details cantact Pmf, G.S. Upadbyaya, Dept of Materials and MetaUurgkal Engineering, Indian Institute of Technology, Kanpur %1&&6~ India; tel: +91-512.597624; fax: +91-512-590260, email: gsuWtk.ac.in.
R.Hatis.
Non-destructive porosity determination in materials by computed tomography
porosity
charac-
a
microstructure.
of
was described.
of a metal produced a
binder phase hardness was high and toughness low. Properties
pressing,
were
determined.
described.
made by hot
sam-
It was noted that
factors have given impetus
A computer
ties of Co, Co-Cu-Sn,
proper-
was
there is a gap between
G.Tomandl, P.Varkoly. (Society for Software Systems, Numberg, Germany.)
of the tools. An investi-
containing
struc-
sintering
Threedimensional computer modelling of grain growth and pore shrinkage during sintering
and tribological
solution
ions to introduce
sintering
were said to be more
sintering theory and practice.
gation of mechanical
aqueous
that
models, are no
in activating
although
erence to applications
and Zr(IV)
and
accurately known. The role of electronic
Al and
in an
Al(II1)
was expressed
based on two-particle
pore shrinkage
persed
science
(Indian Inst. of Technology,Kanpur,
G.S.Upadhyaya. l&l.)
to the challenge
of
that hard metal
Issues in sintering technology
techno-economic
given.
M.Rosso et al. (Polirecnrco di Tonno, Tonno, Italy.)
atomization.
that
by a PM route. Tribological
powders
based on Ni-Cr-B-FeC,
of a
G.de Porru. (CNR-IRTEC, Faenza, Italy.)
nickelchromium-boron-alumina-
It was reported
Conterence on
SinteringandRoPMzooo.
Mechanical and wear properties tough cermet material
from papers presented at the iggg EuropeanConferenceon Advances in Hard Materials Production and International Workshop on Diamond Tool Production held in Turin, Italy. in November 1999. For further details contact the EPMA: Old Bank Buildings, Bellstone, Shrewsbury, !%l NU,UK;tel.: +@-1743-2488~;fiW +44-1743-362968; e-mail: [email protected]. .
zirconia composite
EURO’PM 99, the 7th International
1 ngs
EURO’PM gg. The following Abstracts are
Synthesis
Featuring selected abstracts from the Proceedings of
during
reported.
macrostructural
space-shuttle
Results evolution
with microgravity
flights,
showed effects
novel
associated
sintering.
Computer-aided microstructural sintering
control of evolution during
I’.C.Kapur et al. (Tata Research, Development and Design Cenrre, Pune, India.) The importance during structure
sintering
of microstructural
control
was
Micro-
is influenced
MPR
emphasized.
by material and process
Februarv
2001
39