Kosta L George

20020139680, Oct 3, 2002

Mar 27, 2002

10/109144

Kosta George - Southbridge MA, US

B32B015/01
C25D015/00
C03C027/04
C25D001/00

205/110000, 428/614000, 428/612000, 428/634000, 428/673000, 428/680000, 428/935000, 205/183000

A method for fabricating an abrasive tool. A tool substrate is provided. A surface of the substrate is coated with an electroplatable bonding material. The electroplatable bonding material comprises a mixture of a conductive material and an adhesive material. Abrasive particles are adhered to the bonding material. The abrasive particles are adhered so as to have a predetermined distribution over the coated surface of the substrate. A metal layer is electroplated to the electroplatable bonding material to secure the abrasive particles to the substrate. Thus, in accordance with the present invention, the fabricated abrasive tool has abrasive particles having the predetermine distribution and fixed to the substrate by the adhesive material and the electroplated metal layer.

20070175765, Aug 2, 2007

Feb 1, 2006

11/344496

Kosta George - Southbridge MA, US

C25D 5/54
B23F 21/03

205158000, 451540000

A method for fabricating an abrasive tool. A tool substrate is provided. A surface of the substrate is coated with an electroplatable bonding agent which will chemically bond to the substrate. The electroplatable bonding material comprises a mixture of silver, leadless frit, terpineol, texinol, and copper salt. Abrasive particles are adhered to the bonding material. The abrasive particles are adhered so as to have a predetermined distribution over the coated surface of the substrate. After adhering abrasive particles, the bonding agent is dried and fired in a two step process. A metal layer is electroplated to the electroplatable bonding agent to further secure the abrasive particles to the substrate. Thus, in accordance with the present invention, the fabricated abrasive tool has abrasive particles having the predetermine distribution and fixed to the substrate by the bonding agent which is able to withstand high operating temperatures and the electroplated metal layer.

54927714, Feb 20, 1996

Sep 7, 1994

8/301681

James T. Lowder - Columbus OH
Roy F. Wielonski - Worthington OH
Kosta L. George - Southbridge MA

Abrasive Technology, Inc. - Westerville OH

B22F 706

428565

An improved method of making a monolayer abrasive tool using a relatively low melting point, soft filler metal alloy braze which possesses sufficiently high yield strength combined with a relatively high ductility and low elastic modulus to produce an exceptional bond between a monolayer of superabrasive particles and the tool substrate. The steps of the brazing process include applying a layer of the filler metal alloy including a an active metal in either pre-alloyed or as a mixture with the metal alloy and a monolayer of superabrasive crystals over the filler metal layer. This assembly is heated in a mon-oxidizing atmosphere such as a vacuum to melt the alloy and braze bond the superabrasive particles to the tool substrate. The alloy bond formed possess the properties of a ductility of at least 20 percent elongation, an elastic modulus of less than 15. times. 10. sup. 6 or less, and a yield strength preferably at least about 45,000 to 50,000 psi.