Title: Abrasive wheel containing nickel coated needle-shaped cubic boron nitride particles

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Claims: We claim:

1. A grinding wheel comprising a hub portion and a peripheral grinding portion, the peripheral grinding portion comprising a resin matrix selected from phenolformaldehyde and polyimide resins containing nickel coated needle-shaped cubic boron nitride particles, each particle having a long axis and a transverse short axis, the nickel coating comprising from 30 to 80 weight percent of the coated particle and a substantial portion of the particles being so aligned that their long axes are substantially normal to the working face of the grinding portion.

Other info:

Inventors: Phaal, Cornelius

Application Number: 554121
Filing Date: 1975-02-28
Publication_date: 1977-02-15
Assignee:
Primary Class(es): 51/298 51/295, 51/307
Other Classes:
US Patent Ref:

2545676	Mar, 1951	Small	51/309.
3495960	Feb, 1970	Schladitz	51/298.
3619152	Nov, 1971	Yalof	51/298.
3868232	Feb, 1975	Sioui	51/298.
3918218	Nov, 1975	Zoiss	51/298.

Other Refs:
Primary Examiner: Arnold, Donald J.
Assistant Examiner:
Attorney: Cushman, Darby & Cushman