Conferences

INTERACTION OF STRUCTURAL COMPONENTS OF A NICKEL COMPOSITE IN VACUUM AT 1150 °С

 
O.Fushchich,
  

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2018, #03/04
http://www.materials.kiev.ua/article/2507

Abstract

The interaction of a Ті + 10Мо titanium alloy, which serves as a matrix in a tribological material, with calcium fluoride СaF2 and boron nitride ВN, which play the role of a solid lubricant, during their heating and sintering in a vacuum of 10–5 Pa at 1150 °С for 15 and 120 min, respectively, has been studied. In the heating of a Ті + 10 Мо–CaF2 model specimen for 15 min and sintering of Ті + 10 Мо + CaF2 CAM1 for 120 min, calcium fluoride does not interact with the Ті + 10Мо matrix of the material and does not change its composition and structure; a transition layer between the matrix and solid lubricant does not form. Thus, calcium fluoride preserves its initial lubricating properties. In the sintering of Ті + 10 Мо + CaF2 CAM1 for 120 min, a composite antifriction material with a microheterogeneous structure is synthesized. Its structure is a mixture of solid solutions of molybdenum in α- and β-titanium, which has a body-centered cubic lattice and face-centered hexagonal lattice, in which calcium fluoride CaF2 is distributed in the form of inclusions. In the heating of a Ті + 10 Мо + ВN model specimen for 15 min and sintering of Ті + 10 Мо + ВN CAM2 for 120 min, the interaction of the Ті+10Мо alloy with boron nitride BN occurs to form a transition layer with the phase composition α-TiMo + TiB + TiN + ВN. In the sintering of Ті + 10 Мо + ВN CAM2 for 120 min, a composite material with a microheterogeneous structure is synthesized. Its structure is a solid solution of Mo in α-Ті with a face-centered hexagonal lattice, strengthened by products of interaction of titanium with nitrogen and boron, TiN and ТіВ, in which boron nitride BN is distributed in the form of inclusions.


BEARING STRUCTURAL COMPONENT, CHEMICAL AND PHASE COMPOSITIONS, COMPOSITE MATERIAL, INTERACTION, SOLID LUBRICANT, STRUCTURE, SYNTHESIS, TEMPERATURE