The Influence of Sintering Temperature of Reactive Sintered (Ti, Mo)C-Ni Cermets

Abstract

Titanium-molybdenum carbide nickel cermets ((Ti, Mo)C-Ni) were produced using high energy milling and reactive sintering process. Compared to conventional TiC-NiMo cermet sintering the parameters for reactive sintered cermets vary since additional processes are present such as carbide synthesis. Therefore, it is essential to acquire information about the suitable sintering regime for reactive sintered cermets. One of the key parameters is the final sintering temperature when the liquid binder Ni forms the final matrix and vacancies inside the material are removed. The influence of the final sintering temperature is analyzed by scanning electron microscopy. Mechanical properties of the material are characterized by transverse rupture strength, hardness and fracture toughness.

Design of In Situ Metal Matrix Composites Produced by Powder Metallurgy—A Critical Review

“…Apart from the seemingly simpler preparation by mixing, particles-especially nanometric ones-are often hard to disperse or tend to segregate from the matrix if both display significant differences in density [9]. Additionally, because it is inevitable for powder surfaces to present some level of roughness, impurities, and moisture, many ex situ composites end up suffering from porosity and contamination at the interface of reinforcements with the metal 2 of 61 matrix [10,11], which hampers load bearing capacity, Zener pinning, and Orowan and thermal mismatch strengthening, and ultimately leads to lower overall strengthening [12].…”

“…Metals 2022, 12, x FOR PEER REVIEW 2 of 61 powder surfaces to present some level of roughness, impurities, and moisture, many ex situ composites end up suffering from porosity and contamination at the interface of reinforcements with the metal matrix [10,11], which hampers load bearing capacity, Zener pinning, and Orowan and thermal mismatch strengthening, and ultimately leads to lower overall strengthening [12].…”