Abrasive article and method of use

Abstract

An abrasive article including a body comprising abrasive segments coupled to a major planar surface of a substrate, where a first abrasive segment comprises a first wear life index (w1) that is different than a second wear life index (w2) of the second abrasive segment by at least 5%.

What is claimed is: 
     
         1 . An abrasive article comprising:
 a body comprising abrasive segments coupled to a major planar surface of a substrate;   wherein the abrasive segments include a first abrasive segment and a second abrasive segment;   wherein the first set abrasive segment has a first bond composition and the second abrasive segment has a second bond composition, and the first bond composition and the second bond composition are different;   and further wherein the first abrasive segment comprises a first wear life index (w1) that is different than a second wear life index (w2) of the second abrasive segment by at least 5%.   
     
     
         2 . The abrasive article of  claim 1 , wherein the first wear life index is at least 1. 
     
     
         3 . The abrasive article of  claim 1 , wherein the first wear life index is not greater than 15. 
     
     
         4 . The abrasive article of  claim 1 , wherein the second wear life index is not greater than 2. 
     
     
         5 . The abrasive article of  claim 1 , wherein the second wear life index is at least 0.05. 
     
     
         6 . The abrasive article of  claim 1 , wherein the first wear life index (w1) is different than the second wear life index (w2) of the second abrasive segment by at least 10%. 
     
     
         7 . The abrasive article of  claim 1 , wherein the first wear life index (w1) is different than the second wear life index (w2) of the second abrasive segment by not greater than 99%. 
     
     
         8 . The abrasive article of  claim 1 , wherein the difference between the first wear life index and the second wear life is at least 1. 
     
     
         9 . The abrasive article of  claim 1 , wherein the difference between the first wear life and the second wear life is not greater than 12. 
     
     
         10 . The abrasive article of  claim 1 , wherein the ratio of the first wear life index to the second wear life, w1/w2, is at least 1. 
     
     
         11 . The abrasive article of  claim 1 , wherein w1/w2 is not greater than 25. 
     
     
         12 . The abrasive article of  claim 1 , wherein the body comprises a first set of abrasive segments having the first bond composition and a second set of abrasive segments having the second bond composition, wherein the first set of abrasive segments provides a first abrasive surface area SA 1  and the second set of abrasive segments provides a second abrasive surface area SA 2 , and wherein the first abrasive surface area to the second abrasive surface area, SA 1 /SA 2 , is at least 0.15. 
     
     
         13 . The abrasive article of  claim 1 , wherein the first set of abrasive segments provides a first abrasive surface area SA 1  and the second set of abrasive segments provides a second abrasive surface area SA 2 , and wherein the first abrasive surface area to the second abrasive surface area, SA 1 /SA 2 , is not greater than 10. 
     
     
         14 . The abrasive article of  claim 1 , wherein the first abrasive segment comprises a first set of abrasive particles having a median particle size D50ap1 and a second set of abrasive particles having a median particle size D50ap2, wherein D50ap2/D50ap1 is at least 1.1. 
     
     
         15 . The abrasive article of  claim 1 , wherein the first bond composition comprises a vitreous bond material. 
     
     
         16 . The abrasive article of  claim 1 , wherein the second bond composition comprises a resinous bond material. 
     
     
         17 . The abrasive article of  claim 1 , further comprising a plurality of abrasive bodies attached to a major planar surface of a substrate, wherein the plurality of abrasive bodies includes a plurality of first abrasive bodies and a plurality of second abrasive bodies, wherein the first and second abrasive bodies are arranged in a radial alternating manner relative to each other. 
     
     
         18 . The abrasive article of  claim 1 , wherein the abrasive article is a cup wheel. 
     
     
         19 . A method of using the abrasive article of  claim 1 , comprising edge grinding. 
     
     
         20 . A method of using the abrasive article of  claim 1 , comprising grinding a material that comprises AlTiC.