Liquid Phase Migration during Diamond Powder Sintering by Infiltration Method

Ana Lúcia Diegues  Skury; Guerold S. Bobrovinichii; Sérgio Neves Monteiro; Marcia G. de Azevedo; Apostolos Silva

doi:10.4028/www.scientific.net/MSF.727-728.450

Paper Titles

Magnetic Properties and Hardness of Nanostructured WC-Co Cemented Carbide
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Microstructure and Wear of a Cu-Si-B Alloy and Diamond Composites Obtained in High Pressure and High Temperature Conditions
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Modeling the Densification of 316L Stainless Steels
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Sintering of Cubic Boron Nitride Using Titanium Based Binders
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Liquid Phase Migration during Diamond Powder Sintering by Infiltration Method
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Plasma Sintering of the Steel Reinforced with Nanostructured Carbides
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High-Pressure Assisted Sintering of Ti-20Si-10B and Ti-10Si-5B Powders
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Overspray Powder Characterization of Fe-Based Glassy Alloy
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Evaluation of Changes in Microstructural Coatings Deposited by Thermal Spray
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HomeMaterials Science ForumMaterials Science Forum Vols. 727-728Liquid Phase Migration during Diamond Powder...

Liquid Phase Migration during Diamond Powder Sintering by Infiltration Method

Abstract:

Compacts made of sintered diamond powder (DP) are not only extensively used but also essential cutting inserts for operations such as machining metal components or drilling rocks for petroleum extraction. The high pressure and high temperature (HPHT) sintering can be achieved either by an initial mixture of DP with a metallic binder or by first processing the DP at HPHT, which creates a sintered skeleton, followed by the molten metallic binder infiltration. This work investigates the infiltration of Cu, Co and Ni, as binders, into sintered diamond powders with different particles size. It was found that migration of the liquid phase through the sintered diamond skeleton complies with the Darci Law. The penetration coefficient varied from 0.89 x 10^-7 to 6.41 x 10^-7 μm² indicating that the migration is affected by several factors.

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Periodical:

Materials Science Forum (Volumes 727-728)

Pages:

450-455

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.727-728.450

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Cite this paper

Online since:

August 2012

Authors:

Ana Lúcia Diegues Skury, Guerold S. Bobrovinichii, Sérgio Neves Monteiro, Marcia G. de Azevedo, Apostolos Silva

Keywords:

Diamond Sintering, High-Pressure, High-Temperature, Infiltration, Liquid Migration, Metallic Binder, Penetration Coefficient

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