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Abrasive tools having a permeable structure

  • US 8,475,553 B2
  • Filed: 04/08/2010
  • Issued: 07/02/2013
  • Est. Priority Date: 09/30/2005
  • Status: Active Grant
First Claim
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1. A bonded abrasive tool comprising:

  • a) a blend of abrasive grains including;

    i) agglomerates of filamentary sol-gel alumina abrasive grain having a length-to-cross-sectional-width aspect ratio of at least about 2;

    1 held by a binding material; and

    ii) agglomerated abrasive grain granules including a plurality of abrasive grains held in a three-dimensional shape by the binding material, the abrasive grains having a length-to-cross-sectional-width aspect ratio of about 1.0;

    b) a bond; and

    c) about 50 volume percent to 75 volume percent porosity;

    wherein a content by weight of the agglomerates of filamentary sol-gel alumina abrasive grain is less than a content by weight of the agglomerated abrasive grain granules.

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