Details

Autor(en) / Beteiligte

• Lee, Jung G.
• Lee, M.K.
• Hong, S.J.
• Lee, H.W.
• Pyun, S.P.
• Rhee, C.K.

Titel

Consolidation of mixed diamond and cobalt granule powders by magnetic pulsed compaction

Ist Teil von

• Materials letters, 2010-01, Vol.64 (1), p.35-37

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2010

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Magnetic pulsed compaction (MPC) was introduced to consolidate mixed diamond and cobalt (Co) granule powders for the production of drilling segments. The diamond-Co samples prepared by MPC at the compacting pressure of 4 GPa showed a high sintered density of 99.6% as well as a high green density of 86.4%. A fine and homogeneous microstructure and a high hardness were also observed in the sintered bulk. Finally, a perforating test revealed that a higher drilling speed of 11.71 cm/min and a longer tool life of 7.96 m were obtained for the drilling segments prepared by the MPC process, whereas the values for those fabricated by a conventional process were 10.15 cm/min and 6.55 m, respectively. This property improvement of the MPCed segments was attributed basically to the enhanced green density and the homogeneous distribution of the diamonds.