Preparation of Nb5Si3 intermetallic and Nb5Si3/Nb composite by self-propagating high-temperature synthesis

An experimental investigation on combustion synthesis of transition metal silicides V5Si3, Nb5Si3, and Ta5Si3

“…Experiments were performed at different sample preheating temperatures (T p ) from room temperature to 300 • C. In the absence of sample preheating, only the samples of V:Si = 5:3 and Ta:Si = 5:3 reached selfsustaining reactions. The powder compacts of 5Nb + 3Si required not only a preheating temperature of 200 • C or above, but also an ignition enhancer made up of titanium (Ti) and carbon black (C) powders (with a ratio of Ti:C = 1:1) to ensure a self-propagating combustion wave throughout the entire compact [22]. Detailed description of the experimental set-up and measurement approach was given previously [23,24].…”

“…The apparent activation energy of a self-sustained reaction can be determined by means of constructing the dependence of reaction front velocity on combustion temperature. A simplified relation used is expressed in the following [22][23][24]:…”

Effects of element proportions on microstructures of Nb/Nb5Si3 in situ composites by spark plasma sintering

“…Nb 5 Si 3 has high melting point (2515 • C), low density (7.16 g cm −3 ) and excellent specific mechanical properties at high temperature [4][5][6][7], but Nb 5 Si 3 has low fracture toughness at room temperature and poor deformability at high temperature; currently, these drawbacks hinder the application of Nb 5 Si 3 . Nb has high melting point (2472 • C), excellent fracture toughness and good deformability.…”

Microstructure and hot corrosion behaviors of a γ-toughened Cr13Ni5Si2/Cr3Ni5Si2 ternary metal silicide alloy

“…Recently, transition metal silicides such as Cr 3 Si, MoSi 2 , Ti 5 Si 3 , etc., have attracted considerable attentions due to their high melting point, low density, excellent high-temperature oxidation and creep resistance, etc. [3][4][5][6][7][8][9][10]. Combinations of these outstanding properties make them promising candidate structural material for high-temperature applications.…”