Composite abrasive particles for magnetic abrasive polishing and

Details Composite abrasive particles for magnetic abrasive polishing and Composite abrasive particles for magnetic abrasive polishing and

1986-04-28

1987-08-11

Lieberman, Paul

Abrasive tool making process, material, or composition

With inorganic material

Metal or metal oxide

51293, C09C 168

Patent

active

046859373

ABSTRACT:
Composite abrasive particles for use in magnetic abrasive polishing in which three phases of corundum-phase alumina, .alpha.-iron and iron-alumina spinel are detected by the powder X-ray diffractometry and which contains 48 wt % or more of iron and 11 wt % or more of aluminum. The composite abrasive particles are prepared by mixing starting materials of powders of aluminum and an iron oxide in such a ratio that three phases of corundum-phase alumina, .alpha.-iron and iron-alumina spinel may coexist and so that iron may be contained in an amount of 48 wt % or more and aluminum may be contained in an amount of 11 wt % or more, subjecting the materials to a solid-phase exothermic reaction, and breaking the resultant solid product.

REFERENCES:
patent: 4021263 (1977-05-01), Rosenblum
patent: 4118459 (1978-10-01), Falkenhain
patent: 4217113 (1980-08-01), Suh et al.
patent: 4229214 (1980-10-01), Shushlebin et al.
patent: 4252544 (1981-02-01), Takahashi
patent: 4280935 (1981-07-01), Agiwara
patent: 4439895 (1984-04-01), Richmond

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