Ni-Mn-Co powder catalyst for synthetic diamond is at different stage of the synthesis:
1.spherical Morphology,even chemical composition and fine microstructure are eneficial to nucleation and growth of diamond;
2.Fit for the synthesis of diamond not only of fine particles abrasive grade,but also of coarse particles high grade,which is advantageous to the synthesis of diamonds with different variety and grades;
3.The fracture of the diamond with different diamond grain sizes and the interface where the diamond is crystallized were analyzed through SEM and AES, respectively;
4.In the synthesis system, the carbon can diffuse in three directions, which is helpful for diamond to be crystallized symmetrically and to increase the integration of the crystal;
5.Production cost greatly reduces while yield per cavity increases nearly 30%,electrical current density during synthesis drops 20% resulting in the reduction of consumption of hard alloy head hammer,and saving nearly 30% of metal catalyst;
The results indicate that the NiMnCo powder catalyst is of wide application range, not only being used to synthesize coarse size and high strength diamond, but also being used to synthesize fine size diamond for grind materials.
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