Patent ID: 7980334

Claim:
A diamond-bonded construction comprising: a polycrystalline diamond body comprising a plurality of diamond-to-diamond bonded crystals forming a matrix phase, and a plurality of interstitial regions disposed between the diamond-to-diamond bonded crystals, the polycrystalline diamond body comprising; a first diamond-bonded region comprising the matrix phase and a Group VIII metal selected from the CAS version of the Periodic Table in the interstitial regions; and a second diamond-bonded region adjacent the first region and comprising the matrix phase and a reaction product disposed within the interstitial regions, the reaction product being formed between the diamond crystals in the matrix phase and a reactant material, wherein the reactive material is selected from materials capable of infiltrating the diamond body interstitial regions to form the reaction product, the second diamond-bonded region being substantially free of a catalyst material that is used to initially form the diamond-to-diamond bonded body and extending a depth from a surface of the diamond body; and a material layer disposed over at least a portion of an outer surface of the polycrystalline diamond body, the material layer being formed from the reaction product.