A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
POLYCRYSTALLINE DIAMOND COMPAT WITH IMPROVED THERMAL STABILITY
The present invention relates to a polycrystalline diamond compact with improved thermal stability. According to the present invention, a method for producing the polycrystalline diamond compact comprises the steps of: preparing a primary sintering process by combining a first diamond particle with a metal binder particle and assembling the same; primarily sintering the assembled combination particles; leaching the upper surface of the sintered polycrystalline diamond compact; preparing a second sintering process by combining a second diamond particle with a metal binder particle and assembling the combined particles on the upper surface of the primarily sintered polycrystalline diamond compact; secondarily sintering the primarily sintered polycrystalline diamond compact and the combined particles on the upper surface thereof; and removing the reassembled second diamond particle and metal binder particle by grinding the same. The metal binder has an effect of improving sinterability of diamond particles and impact resistance of sintered diamond, but may cause cracks or damage due to having decreased heat resistance in the case of being applied to a cutting edge portion of a diamond compact. On the other hand, the polycrystalline diamond compact in accordance with the present invention is capable of increasing a lifespan of the polycrystalline diamond by minimizing the content of a residual metal binder on a surface layer portion and increasing the content of a diamond particle having high thermal conductivity.
POLYCRYSTALLINE DIAMOND COMPAT WITH IMPROVED THERMAL STABILITY
The present invention relates to a polycrystalline diamond compact with improved thermal stability. According to the present invention, a method for producing the polycrystalline diamond compact comprises the steps of: preparing a primary sintering process by combining a first diamond particle with a metal binder particle and assembling the same; primarily sintering the assembled combination particles; leaching the upper surface of the sintered polycrystalline diamond compact; preparing a second sintering process by combining a second diamond particle with a metal binder particle and assembling the combined particles on the upper surface of the primarily sintered polycrystalline diamond compact; secondarily sintering the primarily sintered polycrystalline diamond compact and the combined particles on the upper surface thereof; and removing the reassembled second diamond particle and metal binder particle by grinding the same. The metal binder has an effect of improving sinterability of diamond particles and impact resistance of sintered diamond, but may cause cracks or damage due to having decreased heat resistance in the case of being applied to a cutting edge portion of a diamond compact. On the other hand, the polycrystalline diamond compact in accordance with the present invention is capable of increasing a lifespan of the polycrystalline diamond by minimizing the content of a residual metal binder on a surface layer portion and increasing the content of a diamond particle having high thermal conductivity.
POLYCRYSTALLINE DIAMOND COMPAT WITH IMPROVED THERMAL STABILITY
KANG DONG HEON (author)
2015-08-12
Patent
Electronic Resource
Korean
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