Interfacial Phenomena in Fe-TiC Systems and the Effect of Cr and Ni

Abstract

Titanium carbide is used as reinforcement com ponent in composites due to its stability, hardness and wear resistance. A potential application is local reinforce ment of stainless steel castings in which TiC is added only to the surfaces, which acquire wear resistance. This work is part of the study in which Ti and C are added in the mould during casting of stainless steel to form TiC at a specific surface. Wettability, stability and dissolution of the reinforcement particles are key phenomena in produc ing these composites in liquid state. Wetting experiments between TiC and Fe as well as FeNi and FeCr alloys were performed in order to get information about wettability, dissolution and formation of TiC and other phases related to the systems. Contact angles for the systems were at tained without any reactions between the substrate and the alloy during heating. Wetting was not significantly improved by adding Ni or Cr. Dissolution of TiC was very strong into all the alloys. No new phases at the interface were formed in the experiments except for Crcarbides in Crcontaining alloys. These results gave important infor mation about the interfacial phenomena needed in devel oping the production methods.

Lightweight Composite Cermets Obtained by Means of Titanium-Plating

“…Трещина, доходя до твердого зерна, стремится обогнуть или разрушить его, снижая энергию. Огибая волокна в составе композиционного кермета, трещина увеличивает свой путь, что повышает (по сравнению с керамометаллическими материалами [7,[13][14][15][16][17][18][19]) уровень вязкости разрушения; К Ic = (8,2±0,2) МПа•м 1/2 для материала состава 80 об. % TiC + 10 об.…”

Adaptation of TiC Hard Particles Properties and Morphology in Metal Matrix Composites by Refractory Elements

“…In addition, the element carbon diffuses from the TiC into the matrix, which is accompanied by a locally decrease of the solidus temperature and a higher content of liquid phase. It has been observed that TiC can be infiltrated and dissolved through the grain boundaries by the liquid phase [15,16]. However, the (Ti,Mo)C/metal matrix interface is thermodynamically stable and not dissolved by the liquid phase.…”

Studying the Effect of Fine Particles of Tungsten Carbide on the Macro-Structure, Hardness and Microhardness of Gradient Steel Billets

“…Manufacturing technology consists of the smelting of matrix metal in an open-type induction furnace (without protective atmosphere), its further casting into the installation of centrifugal casting of horizontal type with simultaneous supply of tungsten carbide into the metal. As the matrix metal was chosen to mark CSN 14341 [11], since the content of such elements as chromium and nickel in the steel composition increases the performance and the degree of interaction of the refractory particles with metal melts [12,13].…”