To provide a bearing material for a porous hydrostatic gas bearing which makes it possible to effect firm joining and integration without causing exfoliation or the like between the porous sintered metal layer and the supporting metal made of stainless steel, and enhance porosity of the porous sintered metal layer to increase the floating amount by the compressed gas circulating through the porous sintered metal layer, and to provide a porous hydrostatic gas bearing using the same.

Disclosed is a bearing material including supporting metal 2 made of stainless steel, and a porous sintered metal layer 4 integrated with at least one surface of the supporting metal 2 by a bonding layer 3. Particles of an inorganic substrate are dispersed and contained at grain boundaries of the porous sintered metal layer 4. The porous sintered metal layer 4 containing the particles of the inorganic substance are composed of, by weight, 4 to 10% tin, 10 to 40% nickel, not less than 0.1 and less than 0.5% phosphorus, and the balance copper.

COPYRIGHT: (C)2010,JPO&INPIT