Solid PCD with transition layers to accelerate full leaching of catalyst

• Main Author: BAO YAHUA
• Format: Patent
• Language: Chinese; English
• Published: 26.09.2017
• Subjects: CASTING; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; WORKING METALLIC POWDER

A method of making a polycrystalline diamond compact includes forming a first layer of polycrystalline diamond precursor materials comprising diamond particles and a first concentration of catalyst, forming a second layer of polycrystalline diamond precursor materials comprising diamond particles and a second concentration of catalyst, and placing a layer of an infiltrant material in the proximity of the first or the second layer of polycrystalline diamond precursor materials. The second concentration of catalyst is greater than the first concentration of catalyst. The infiltrant material is a catalyst. The first layer and the second layer are sintered under high-pressure high-temperature conditions in the presence of the infiltrant material to form the polycrystalline diamond compact. At least a portion of the catalyst is leached from the polycrystalline diamond compact. 种制造多晶金刚石压坯的方法，包含形成包括金刚石颗粒和第浓度的催化剂的第层的多晶金刚石前体材料，形成包括金刚石颗粒和第二浓度的催化剂的第二层的多晶金刚石前体材料，以及将浸透剂材料层放置在第层或第二层的多晶金刚石前体材料附近。催化剂的第二浓度大于催化剂的第浓度。浸透剂材料为催化剂。