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Distortion of crystals of strontium ferrite by milling
and Powder Metallurgy, Vol 39, No 12, 1992, 1104-1108. (In J a p a n e s e ) . A120:~-(5 to 20) vol% Mo composites were fabricated by v a c u u m hot pressing. The structure is shown to consist of AluO:~ grains containing dispersed Mo particles a n d 1 p m Mo g r a i n s a t AI~0:3 g r a i n boundaries. It is shown t h a t PM m e t h o d s can be used to fabricate m e t a l / c e r a m i c n a n o c o m p o s i t e s . The MO is s h o w n to i n h i b i t g r o w t h of t h e Al~O:~ g r a i n s . i m p r o v e m e n t s of 88 MPa a n d for AL203 a K,~. of 7.21 MPa/m 1/z were found.
difference of 640°C between t h e j u n c t i o n s an open circuit voltage of 300 mV a n d a m a x i m u m power o u t p u t of 13 mW were produced. IMPROVEMENT IN THE MAGNETIC P R O P E R T I E S OF S I N T E R E D IRONSTRONTIUM FERRITE MAGNETS
Y. Keneko a n d A. H a m a m u r a ( S u m i t o m o Special Metals, Osaka, J a p a n ) , J J a p a n Soe Powder a n d Powder Metallurgy, Vol 39, No 11, 1992, 937-947. (In J a p a n e s e ) . A study of the effects of composition a n d process p a r a m e t e r s on t h e densification, Electrical and magnetic grain growth control, preferred o r i e n t a t i o n a n d m a g n e t i c p r o p e r t i e s of s i n t e r e d Sr PREPARATION OF IRON SILICIDE ferrite m a g n e t s is described. Effects of THERMOELECTRIC GENERATOR BY HIP d e v i a t i o n from stoichiometry and additions of CaO, SiO2 a n d Al20,~ were S. Ito et al (Science University of Tokyo, studies. Low melting p o i n t liquid p h a s e s J a p a n ) , J J a p a n Soc Powder a n d Powder are reported to aid densification. A1203 Metallurgy, Vol 39, No 10, 1992, 870-874. forms a solid solution with t h e Sr ferrite (In J a p a n e s e ) . p h a s e a n d e n h a n c e s coercivity. Preferred The production of FeSi2 is described, t h e o r i e n t a t i o n was controlled by pressing in a process comprises milling of Fe a n d Si magnetic field. Properties are discussed in powders to for ¢(Fe2Sis a n d sFeSi powders relation to costs of manufacture. a n d HIP at 840 to 960°C a n d 10 to 100 MPa a n d 30 m i n u t e s . D u r i n g HIP FeSiz is E F F E C T S OF ADDITION OF r e p o r t e d to be formed. The e l e c t r i c a l STRONTIUM AND CHROMIUM OXIDES properties were measured. The application ON MAGNETIC P R O P E R T I E S OF of the material is s a i d t o b e a S I N T E R E D STRONTIUM FERRITE thermoelectric g e n e r a t o r formed by doping Mn a n d Co to form s e m i c o n d u c t o r P a n d N Y. Kaneko et al (Sumitomo Special Metals, type junctions. With a temperature Osaka, J a p a n ) , J J a p a n Soc Powder a n d
_o
Powder Metallurgy, Vol 39, No 11, 1992, 948-952. (In J a p a n e s e ) . It is noted t h a t t h e addition of Sr and Cr oxides aids t h e s i n t e r i n g of Sr ferrite m a g n e t s c o n t a i n i n g CaO a n d Si02 by increase in the p r o p o r t i o n of liquid p h a s e t h u s e n h a n c i n g densification. I n c r e a s e d coercivity is a t t r i b u t e d to the presence of Cr203. DISTORTION OF CRYSTALS OF STRONTIUM FERRITE BY MILLING
H. Taguchi et al (TDK Corp, Narita, J a p a n ) , J J a p a n Soc Powder a n d Powder Metallurgy, Vol 39, No 11, 1992, 9 5 9 - 9 6 3 . (In J a p a n e s e ) . The p r e p a r a t i o n of Sr ferrite p o w d e r from Fe~O3 a n d SrCO3 for m a g n e t s is described. The effects of milling on the magnetic properties of the powders was i n v e s t i g a t e d a n d it is r e p o r t e d t h a t coercivity is reduced by 40%. Deformation of t h e powder as a result of milling was observed. METAL INJECTION MOULDING OF FERROMAGNETIC FERRITE POWDERS IN A MAGNETIC FIELD
K. Okimoto et al (Industrial Research Inst, Kyushi, J a p a n ) , J J a p a n Soc Powder a n d Powder Metallurgy, Vol 39, No 11, 1992, 970-976. (In J a p a n e s e ) .
ceramitec'94 6th International Trade Fair of Machinery, Equipment, Plant, Processes and Raw Materials for Ceramics and Powder Metallurgy
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@ Munich, 11-15 October 1994 ¢:
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Information: Pattern Ltd. London House, 243-253 Lower Mortlake Road, Richmond, Surrey TW9 2LL, Tel. 081 940 4625, Tx 927051 Lonfin G, Fax 081 948 1442. Contact: Roger D. Sherman
Organizer: MOnchener Messe- und Ausstellungsgesellschaft mbH, Pestfach 121009, D- 8000 M@nchen 12, < 1.7. 1993:D-80325 MQnchen > Tel, (89) 5t 07-0, Fax (89) 51 07-1 72, Tx 5212086 ameg d.
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difference of 640°C between t h e j u n c t i o n s an open circuit voltage of 300 mV a n d a m a x i m u m power o u t p u t of 13 mW were produced. IMPROVEMENT IN THE MAGNETIC P R O P E R T I E S OF S I N T E R E D IRONSTRONTIUM FERRITE MAGNETS
Y. Keneko a n d A. H a m a m u r a ( S u m i t o m o Special Metals, Osaka, J a p a n ) , J J a p a n Soe Powder a n d Powder Metallurgy, Vol 39, No 11, 1992, 937-947. (In J a p a n e s e ) . A study of the effects of composition a n d process p a r a m e t e r s on t h e densification, Electrical and magnetic grain growth control, preferred o r i e n t a t i o n a n d m a g n e t i c p r o p e r t i e s of s i n t e r e d Sr PREPARATION OF IRON SILICIDE ferrite m a g n e t s is described. Effects of THERMOELECTRIC GENERATOR BY HIP d e v i a t i o n from stoichiometry and additions of CaO, SiO2 a n d Al20,~ were S. Ito et al (Science University of Tokyo, studies. Low melting p o i n t liquid p h a s e s J a p a n ) , J J a p a n Soc Powder a n d Powder are reported to aid densification. A1203 Metallurgy, Vol 39, No 10, 1992, 870-874. forms a solid solution with t h e Sr ferrite (In J a p a n e s e ) . p h a s e a n d e n h a n c e s coercivity. Preferred The production of FeSi2 is described, t h e o r i e n t a t i o n was controlled by pressing in a process comprises milling of Fe a n d Si magnetic field. Properties are discussed in powders to for ¢(Fe2Sis a n d sFeSi powders relation to costs of manufacture. a n d HIP at 840 to 960°C a n d 10 to 100 MPa a n d 30 m i n u t e s . D u r i n g HIP FeSiz is E F F E C T S OF ADDITION OF r e p o r t e d to be formed. The e l e c t r i c a l STRONTIUM AND CHROMIUM OXIDES properties were measured. The application ON MAGNETIC P R O P E R T I E S OF of the material is s a i d t o b e a S I N T E R E D STRONTIUM FERRITE thermoelectric g e n e r a t o r formed by doping Mn a n d Co to form s e m i c o n d u c t o r P a n d N Y. Kaneko et al (Sumitomo Special Metals, type junctions. With a temperature Osaka, J a p a n ) , J J a p a n Soc Powder a n d
_o
Powder Metallurgy, Vol 39, No 11, 1992, 948-952. (In J a p a n e s e ) . It is noted t h a t t h e addition of Sr and Cr oxides aids t h e s i n t e r i n g of Sr ferrite m a g n e t s c o n t a i n i n g CaO a n d Si02 by increase in the p r o p o r t i o n of liquid p h a s e t h u s e n h a n c i n g densification. I n c r e a s e d coercivity is a t t r i b u t e d to the presence of Cr203. DISTORTION OF CRYSTALS OF STRONTIUM FERRITE BY MILLING
H. Taguchi et al (TDK Corp, Narita, J a p a n ) , J J a p a n Soc Powder a n d Powder Metallurgy, Vol 39, No 11, 1992, 9 5 9 - 9 6 3 . (In J a p a n e s e ) . The p r e p a r a t i o n of Sr ferrite p o w d e r from Fe~O3 a n d SrCO3 for m a g n e t s is described. The effects of milling on the magnetic properties of the powders was i n v e s t i g a t e d a n d it is r e p o r t e d t h a t coercivity is reduced by 40%. Deformation of t h e powder as a result of milling was observed. METAL INJECTION MOULDING OF FERROMAGNETIC FERRITE POWDERS IN A MAGNETIC FIELD
K. Okimoto et al (Industrial Research Inst, Kyushi, J a p a n ) , J J a p a n Soc Powder a n d Powder Metallurgy, Vol 39, No 11, 1992, 970-976. (In J a p a n e s e ) .
ceramitec'94 6th International Trade Fair of Machinery, Equipment, Plant, Processes and Raw Materials for Ceramics and Powder Metallurgy
|
@ Munich, 11-15 October 1994 ¢:
J
Information: Pattern Ltd. London House, 243-253 Lower Mortlake Road, Richmond, Surrey TW9 2LL, Tel. 081 940 4625, Tx 927051 Lonfin G, Fax 081 948 1442. Contact: Roger D. Sherman
Organizer: MOnchener Messe- und Ausstellungsgesellschaft mbH, Pestfach 121009, D- 8000 M@nchen 12, < 1.7. 1993:D-80325 MQnchen > Tel, (89) 5t 07-0, Fax (89) 51 07-1 72, Tx 5212086 ameg d.
Coupon
ceramitec
'94
Please send further information O Exhibitor
O Visitor
Name/Company Street, R O. Box
MESSEMONCHEN~I~INTERNATIONAL
Town. Postal Code
MPR June 1993 65