The investigation aims to clarify the influence of scan parameters on morphology and phase constitution CoAl2O4 inoculants in Inconel 718 (IN718) superalloy processed by selective laser melting (SLM). Gas atomized IN718 powder feedstock was uniformly blended with 0.2 wt% flakes a range understand effect inoculant additions microstructure. Similar reactions observed investment cast Ni-superalloy...

A micro-Raman spectroscopy study of a multi-coloured (yellow, blue, white, redish-brown and brown-black) tile shard from the Citadel of Algiers was undertaken. XRD and EDX were used as complementary techniques. The study shows that the heterogeneous three-shade yellow pigment on the tile is composed largely of the ancient ternary (Pb-Sn-Sb) pyrochlore oxide with a dominant Pb-O vibration at 127...

Waste glycerol obtained as by-product of biodiesel production has been submitted to a sequential physico-chemical treatment in order make it suitable for continuous Aqueous-Phase Reforming (APR) tubular reactor. Special focus was given the impact impurities. APR performed using 0.3%Pt/CoAl2O4 catalyst, at 260 °C and 50 bar within WHSV range 6–55 h−1 cover whole conversion ranges. Glycerol yield...

Modulation excitation spectroscopy (MES) coupled with time-resolved X-ray absorption (XAS) was applied to unpromoted and Co-promoted Mo-based hydrotreating catalysts (i.e., Mo CoMo catalysts) for investigating the minute as well instantaneous differences in active site composition under influence of H2S H2O. Transient experiments during alternating sulfur- water-rich conditions were performed a...

Zhao et al. employed operando X-ray absorption spectroscopy to examine the structural change of Ni0.5Co0.5-MOF-74 during electrochemical water oxidation. Ni and Co metal nodes undergo a simultaneous transition from hydroxide oxyhydroxide analogs as higher anodic potentials are applied. Discovery more effective oxygen evolution reaction (OER) catalysts is critical for achieiving high rate energy...