Authors:
Gian Pietro De Gaudenzi (OMCD Tek Hub SpA, Italy)
Mattia Garabelli (OMCD Tek Hub SpA, Italy)
Fransisca Pirone (OMCD Tek Hub SpA, Italy)
Sandra Tedeschi (OMCD Tek Hub SpA, Italy)
Abstract:
In the pursuit of developing alternative hardmetal systems to replace WC-Co grades for wear applications, ?-carbides and Functionally Graded HardMetals have garnered significant attention. This study focuses on characterizing a specific type of Functionally Graded HardMetals, more accurately defined as Functionally Layered HardMetals. The investigation examines the effects of coupling layers composed of different carbides and binder compositions. Two ?-carbides, niobium carbide and titanium carbide, were studied both in combination with each other and with tungsten carbide. Microstructural analyses of stacked samples revealed the formation of mixed carbide layers at the interfaces and the mutual migration of small amounts of refractory carbides. The study evaluates the impact of these compositional gradients on mechanical properties and the interaction of the coupled systems with oxidizing environments at room and elevated temperatures. These findings provide valuable insights for the development of layered hardmetal systems composed of various carbides, tailored to achieve functional objectives.
DOI:
https://doi.org/10.59499/EP256768126
