The results show that the addition of copper modifies appreciably the number and perhaps the nature of some phases that precipitate in this alloy system. We showed that the number of the types of the equilibrium η phase increases and that for the underaged states this equilibrium η phase ...
As part of this work, a detailed investigation is being made of silver additions to a wide range of aluminium–copper–magnesium alloys and some interesting results have been obtained for aluminium–2.5 per cent copper–1.5 per cent magnesium (contents expressed in weight percentages). As reported...
Copper catalysisThe conjugate methylation of α,β-unsaturated ketones with trimethylaluminium occurs smoothly in a very simple procedure under the catalytic effect of Cu 1 salts. Scope and limitations of this process as well as the influence of solvent and catalyst on the kinetics were studied. ...
Copper-catalyzed asymmetric conjugate addition of trialkylaluminium reagents to trisubstituted enones: construction of chiral quaternary centers. Alexakis, A., Copper-catalyzed Asymmetric Conjugate Addition of Trialkylaluminium Reagents to Trisubstituted Enones: Construction of Chiral Quaternary Centers. ... ...
Using casting simulations, a copper mold was designed to achieve cooling rates above 100 K/s with the aim of producing a Zr-rich supersaturated solid solution. Microstructural analysis revealed that the addition of Zr leads to notable changes in the microstructure characterised by the formation of ...
This paper investigates the effect of the addition of phos-phates or copper nitrate on the morphology and electrochemical behaviour of a novel environmentally friendly conversion coating basedonthe combinationof a,uotitanate conversion systemand a silane coupling agent on aluminium alloyAA6014.This syste...
Al(OTf)(3): An Efficient Lewis Acid Additive for Domino Addition-Elimination of Grignard Reagents to Activated Ketonesaluminium triflate... Tanya,Pieterse,Melanie,... - 《Cheminform》 被引量: 0发表: 2016年 Chiral Diselenide Ligands for the Asymmetric Copper-Catalyzed Conjugate Addition of Grignard...
The results indicated that the addition of Mg leads to the segregation of the copper phase, resulting in the formation of the block-like form of the CuAl2 phase rather than its finer eutectic-like form. This makes it more difficult to dissolve the CuAl2 phase during solution heat treatment....
chromium, nickel, cobalt, copper, tungsten, vanadium, titanium, molybdenum, manganese or niobium, and may also contain the aluminium required as reducing agent. Thus it may be ferro-chrome-aluminium alloy containing up to 50 per cent of aluminium, a ferro-chrome-silicon alloy or a ferro-...
When using silica supported copper-zinc oxide catalysts in the hydrogenolysis of methyl acetate, a profound effect of zinc on the activity and selectivity ... F Vandescheur,LH Staal - 《Applied Catalysis A General》 被引量: 90发表: 1994年 Effects of Zinc addition on the Microstructure and Mel...