Bonded abrasive with low wetting bond material

Abstract

The subject application relates to bonded abrasive with low wetting bond material. An abrasive article including a bonded abrasive body having a particular MOR/EMOD ratio associated with a particular bond vol %. The body also can include a) an average Bond Post Area (BPA) of not greater than microns 2 ; b) an average Bond Post Count (BPC) of at least 140 per 1536 mm 2 ; c) an average bond wetting radius of at least 30/microns; or d) a combination of a) and b).

What is claimed is: 
     
         1 . An abrasive article comprising:
 a body comprising:
 a bond material comprising an inorganic material; 
 abrasive particles contained in a bond material; 
 a MOR/EMOD ratio of at least 1.05; a bond vol % of at least 18% and not greater than 30% and 
 wherein the body further comprises at least one of:
 a) an average Bond Post Area (BPA) of not greater than 2400 microns 2 ; 
 b) an average Bond Post Count (BPC) of at least 140 per 1.536 mm 2 ; 
 c) an average bond wetting radius of at least 30 microns; and 
 d) a combination of a) and b). 
 
   
     
     
         2 . The abrasive article of  claim 1 , further comprising an average Bond Post Area (BPA) of not greater 2400 micron 2 . 
     
     
         3 . The abrasive article of  claim 1 , further comprising an average Bond Post Count (BPC) per 1.536 mm 2  of at least 140 bond posts per 1.536 mm 2 . 
     
     
         4 . The abrasive article of  claim 1 , further comprising an average Bond Post Area (BPA) of at least 400 micron 2  and not greater than 925 micron 2 , and further comprising an average Bond Post Count (BPC) per 1.536 mm 2  of at least 40 and not greater than 300 bond posts per 1.536 mm 2 . 
     
     
         5 . The abrasive article of  claim 1 , further comprising an average bond wetting radius of at least 30 microns. 
     
     
         6 . The abrasive article of  claim 1 , wherein the 25th percentile bond post area is at least 770 micron 2  and not greater than 795 micron 2 . 
     
     
         7 . The abrasive article of  claim 1 , wherein the 50th percentile bond post area is at least 1830 micron 2  and not greater than 1880 micron 2 . 
     
     
         8 . The abrasive article of  claim 1 , wherein the 75th percentile bond post area is at least 4600 micron 2  and not greater than 4850 micron 2 . 
     
     
         9 . The abrasive article of  claim 1 , comprising an average Bond Post Volume (BPV) per vol % bond material of not greater than 6000 micron 3 . 
     
     
         10 . The abrasive article of  claim 1 , wherein the abrasive particles define a multimodal particle size distribution. 
     
     
         11 . The abrasive article of  claim 1 , wherein the abrasive article comprises a porosity of at least 1 vol % and not greater than 65 vol %. 
     
     
         12 . The abrasive article of  claim 1 , wherein the abrasive article comprises a density of at least 2.10 g/cm 3  and not greater than 2.60 g/cm 3 . 
     
     
         13 . The abrasive article of  claim 1 , wherein the abrasive article comprises an MOR of at least 55 MPA and not greater than 120 MPA. 
     
     
         14 . The abrasive article of  claim 1 , wherein the abrasive article comprises an MOE of at least 55 GPa and not greater than 90 GPa. 
     
     
         15 . The abrasive article of  claim 1 , wherein the abrasive article comprises an abrasive particle content of at least 1 vol % and not greater than 80 vol %. 
     
     
         16 . The abrasive article of  claim 1 , wherein the abrasive article comprises a ratio of abrasive particles vol %/bond vol % (APv/ABv) of at least 1 and not greater than 10. 
     
     
         17 . The abrasive article of  claim 1 , wherein the abrasive particles comprise a material comprising at least one of an oxide, carbide, nitride, boride, diamond, or any combination thereof. 
     
     
         18 . The abrasive article of  claim 1 , wherein the abrasive particles comprise at least one material from the group of alumina, silica, zirconia, or any combination thereof. 
     
     
         19 . The abrasive article of  claim 1 , wherein the abrasive article is in the shape of a wheel. 
     
     
         20 . The abrasive article of  claim 1 , wherein the body has a thickness of at least 10 mm and not greater than 100 mm.