Deformation mechanisms of polycrystalline MoSi2 alloyed with 1 at.% Nb

Improved ductility and oxidation resistance in Nb and Al co-substituted MoSi2

“…The system chosen is co-substitution of Nb and Al in MoSi 2 . Nb was chosen as it improves low temperature deformability and at the same time improves high temperature strength [8,30], while Al was chosen to improve the intermediate temperature oxidation resistance. Compositions of (Mo 1Àx Nb x )(Si 0.96 Al 0.04 ) 2 within the C11 b phase were synthesized and the oxidation behavior was determined from TGA.…”

Effects of Nb-Alloying on High-Temperature Oxidation of MoSi2

“…The starting composition of the alloys were MoSi 2.01 and (Mo 1−x , Nb x )Si 2.01 . Experimental procedure is detailed in previous publications [10,23,24]. there was some variation in the oxide thickness from one point on the sample to the next point.…”

“…Nb was found to be the most potent alloying element in improving mechanical properties of MoSi 2 . Addition of 1 at.% Nb to MoSi 2 was found to lower its brittle-to-ductile transition temperature to room temperature [10]. At very high temperatures (≈ 1600…”

“…• C), alloying MoSi 2 with 1 at.% Nb increased its yield strength by an order of magnitude compared to pure samples [10]. These alloying strategies may only be utilized successfully if the impurities do not aect oxidation resistance of MoSi 2 adversely.…”

Solid solution softening and enhanced ductility in concentrated FCC silver solid solution alloys

“…Solid solution softening phenomenon was firstly discovered, and extensively studied in body centered cubic (BCC) metal alloys [12]. It was also found in intermetallics [13], semiconductors [14], and ceramic [15], whereas its experimental report on FCC metals was relatively seldom. The lower yield strength is a very desirable material property in the applications associated with solid-state bonding.…”