Abrasive particles encapsulated with a metal envelope of allotriomorphic dentrites

Abstract

Abstract Abrasive particles are improved in function by encapsulating them with a metallic envelope; preferably the envelope is made of a pure metal in dendritic crystalline form. Desirably the abrasive substrate is placed in contraction by the envelope which is heat shrunk onto the abrasive substrate. The preferred method is to deposit the metal on the substrate at an elevated temperature by contacting a vapor of the metallic compound with the substrate particle under reducing conditions. The preferred primary abrasive is a diamond, and it is preferably etched before coating. Superior formed abraders may be formed by metal bonding such encapsulated abrasives with a metal matrix which forms a continuous phase in which the abrasive particles may be positioned. The encapsulated abrasive particle may form the primary abrasive together with a secondary abrasive which is not as hard as the primary abrasive and which may or may not be encapsulated with a metal. The primary and secondary abrasive may in one form of the abrader be distributed in the continuous phase metal binder forming the matrix.

Inventors

• 👤 Arthur G Wilder
• 👤 Harold C Bridwell

Bibliographic Details