Elena Gordo

TL;DR: In this article, a reduction mechanism was proposed, emphasizing the surface metallization at the early stage of electrolysis through the propagation of the metal-oxide-electrolyte three-phase interline (3PI).

TL;DR: In this article, the influence of pellets preparation conditions, cell voltages and temperatures on the reduction process of solid Cr2O3, in the form of an assembled cathode of porous pellets attached to a current collector, to chromium powder was investigated in molten CaCl2 and a molten equimolar mixture of CaCl 2 and NaCl.

TL;DR: In this article, powder metallurgy techniques were used to manufacture metal matrix composites and wear tracks were analyzed by optical and scanning electron microscopy (SEM) to clarify wear mechanisms.

Abstract: The extensive industrial employment of titanium is hindered by its high production costs where reduction of these costs can be achieved using cheap alloying elements and appropriate alternative processing techniques. In this work the feasibility of the production of low-cost titanium alloys is addressed by adding steel to pure titanium and processing the alloys by powder metallurgy. In particular, a spherical 4140 LCH steel powder commonly used in metal injection moulding is blended with irregular hydride-dehydride Ti. The new low-cost alloys are cold uniaxially pressed and sintered under high vacuum and show comparable properties to other wrought-equivalent and powder metallurgy titanium alloys. Differential thermal analysis and X-ray diffraction analyses confirm that Ti can tolerate the employment of iron as primary alloying element without forming detrimental TiFe-based intermetallic phases. Thus, the newly designed α+β alloys could be used for cheaper non-critical components.

TL;DR: In this paper, a set of low cost beta alloys with the composition Ti-7Fe, processed by conventional powder metallurgy (PM), were prepared by conventional blending of elemental Ti hydride-dehydride powder with three different Fe powder additions: water atomised Fe, Fe carbonyl and master alloy Fe-25Ti.