A comprehensive literature review on recently rediscovered Co- and/or CoNi-based superalloys, strengthened by the γ' phase, revealed a relationship between configurational entropy of system and solvus temperature. This study was conducted high Cr superalloy with to test our hypothesis based sustainable metallurgy framework. Thermodynamic calculations were performed design chemical compositions,...

The gas sensitivity of semiconductor metal oxides, such as γ-Fe2O3 and SnO2, is investigated together with the synergistic effects in conjunction grapheme. Nanoparticles γ-Fe2O3, γ-Fe2O3/SnO2, γ-Fe2O3/SnO2/RGO, prepared by two-step fabrication, were assembled gas-sensing devices to assess their sensitivities; response recovery times for detection ethanol, methanol, isopropanol, formaldehyde, H2...

Recently, Heptafluoroisobutyronitrile (C4F7N) has received widespread attention in replacing one of the most greenhouse-insulating gas, SF6. However, gas leakage is incredibly harmful to health operational personnel and security industry production, developing C4F7N detection technology great necessity. In this work, adsorption properties, as well sensing performance on 3d VIII atom-decorated γ...

Cracking of nickel superalloys with a high content γ’-phase remains an unresolved problem, including in technologies for repairing gas turbine engines blades. Laser cladding is method material deposition used to repair parts exposed aggressive environment and surface wear. Cladding parameters have influence on cracking susceptibility superalloys. Alloy ZhS32 has propensity hot when laser radiat...

Increased adoption of additively manufactured superalloys has led to the consideration revised heat treatment approaches for these materials. The rapid cooling during additive manufacturing processes been seen suppress gamma prime (γ′) precipitation, which raised possibilities omitting high-temperature solution step that usually precedes ageing alloys. In this work, as-built microstructure a hi...

Grain size is an important parameter controlling the mechanical behavior and useful life of turbine disks. During heat treatment above the gamma prime (γ′) solvus the grain size increases dramatically as the γ′ particles dissolve. The grain size then stagnates as the volume fraction of the γ′ phase approaches zero. In general, the grain size at stagnation cannot be described by classic Zener pi...

Let Γ be a connected bridgeless metric graph, and fix point v of Γ. We define combinatorial iterated integrals on along closed paths at v, unipotent generalization the usual cycle pairing analogue Chen's Riemann surfaces. These descend to bilinear between group algebra fundamental tensor first homology Γ, ∫:Zπ1(Γ,v)×TH1(Γ,R)→R. show that this two-step quotient allows one recover base-point up w...

Objetivo: En este estudio se evaluó el efecto de la modificación con óxido zinc del soporte convencional en catalizadores hidrodesulfuración (HDS) a base polioxometalato Anderson-Evans NiMo5W. Metodología: Los fueron sintetizados por método co-precipitación NiMo5W sobre Al2O3. caracterizaron FRX, MEB/EDS, CHONS, propiedades texturales, FT-IR, Raman y titulación potenciométrica n-butilamina. Res...