RT Journal Article
T1 Novel high entropy alloys as binder in cermets: From design to sintering
A1 Prieto Muñoz, Estela María
A1 Vaz-Romero, Álvaro
A1 Gonzalez Julian, J.
A1 Alvaredo Olmos, Paula
AB In recent years a new group of alloys has emerged breaking with the classical alloying concepts of physical metallurgy, high entropy alloys (HEA). Their main characteristic is that these alloys present 4 or 5 main elements increasing the entropy of the system and favouring the formation of a single phase. The disordered solid solution leads to develop an alloy with improved properties, in particular high thermal stability, hardness and strength. These properties make this group of alloys attractive as potential candidates for alternative binders in hard materials. In this work, two new compositions have been designed with the aim of obtaining a single BCC phase, reducing the cost and minimizing the presence of critical elements using elements that can present good potential properties for a cermet and with low toxicity and price such as Al, Cr, Mo, Ni, Fe and Ti. The design has been made based on the composition calculation applying the HEA phase formation empirical rules from literature in combination with thermodynamic simulations by Calphad method. The viability of the compositions has been studied through the processing of the compositions by casting and the study of wettability and solubility at high temperature on the hard phase of TiCN. Once the chosen compositions have been validated as competitive binders, cermets have been consolidated by spark plasma sintering (SPS) and the influence of the compositions on the mechanical properties of the compound materials has been studied.
PB Elsevier
SN 0263-4368
YR 2021
FD 2021-09
LK https://hdl.handle.net/10016/33866
UL https://hdl.handle.net/10016/33866
LA eng
NO The current investigation was supported by the Regional Government of Madrid through the program ADITIMAT, ref. S2018/NMT-4411.
DS e-Archivo
RD 30 jun. 2024