Title:
PRODUCTION OF LOW PERMEABILITY SPUTTERING COBALT BASE TARGET MATERIAL FOR MAGNETIC RECORDING MEDIUM
Document Type and Number:
Japanese Patent JPH108243
Kind Code:
A
Abstract:
To provide a method for producing a low permeability sputtering Co base target material for a magnetic recording medium capable of producing thin coating of high performance without deteriorating the magnetic properties of the thin coating.
The gas atomizing powder of a CO-Cr-Ta base allay is filled and sealed into a vessel made of metal, which is subjected to high temp. high pressure pressing and compacting in a die for pressure compression, after that, the vessel is removed, and the metallic compacted part is discharged, which is subjected to heat treatment for reducing its permeability to low one in the temp. range of 800 to 1250°C, is cooled and is machined into a prescribed shape.
Inventors:
YANAGIYA AKIHIKO
OKAWA ATSUSHI
KUNIWAKI YOSHIHARU
TANAKA YOSHIKAZU
OKAWA ATSUSHI
KUNIWAKI YOSHIHARU
TANAKA YOSHIKAZU
Application Number:
JP16347596A
Publication Date:
January 13, 1998
Filing Date:
June 24, 1996
Export Citation:
Assignee:
SANYO SPECIAL STEEL CO LTD
International Classes:
C22C33/02; C22C19/07; C23C14/14; C23C14/34; G11B5/85; G11B5/851; H01F41/18; (IPC1-7): C23C14/34; C22C19/07; C22C33/02; C23C14/14; G11B5/85; H01F41/18
Attorney, Agent or Firm:
Shiina Akira