METHOD OF COMPACTING SOLID POWDERS WITH HARD COATING Russian patent published in 2009 - IPC B22F3/12 B22F1/02 

FIELD: metallurgy.

SUBSTANCE: intermediary layer out of compound different in contents from material of particles of core is applied on particles of core consisting from at least one compound chosen from nitrides of metal and metalloid, metal carbides and metalloid, metal carbonitrides and metalloid, metal borides and metalloid, metal oxides and metalloid, metal sulphides and metalloid, metal silicides and metalloid, and diamond. Compound of intermediary layer is capable to bind with material of particles and with metal chosen from a group: iron, cobalt, nickel, copper, titanium, aluminium, magnesium, lithium, beryllium, silver, gold, platinum and their mixtures. On the intermediary layer there is applied an external layer out of metal chosen from a group: iron, cobalt, nickel, and their mixtures forming component particles. Produced particles are moulded, and liquid phase sintering is performed at temperature sufficient for transforming at least part of the external layer into a liquid state within time facilitating dissolution of part of the intermediary layer in the liquid external layer to produce effective amount of liquid therefore achieving practically absolute density without applying considerable external compacting pressure.

EFFECT: producing item of high density, hardness and wear resistance.

44 cl, 7 dwg