Abstract One of the pivoting problems geochemistry and geophysics Moon is structure its central region, i.e., core adjacent transition layer located at boundary between solid mantle liquid or partially molten core. The chemical composition internal region were simulated based on joint inversion seismic, selenophysical, geochemical parameters that are not directly interrelated. solution inverse ...

Introduction: Earth's outer core is substantially less dense that pure Fe-Ni, requiring ~3-9% of the core to be composed of a "light" element or elements [1]. Taking into account their cosmochemical availability, the elements H, C, O, Si, and S have been proposed as significant light elements in Earth's core [2]. The iden-tity(ies) of the light element(s) in Earth's core have implications for u...

The electrochemical performance of a Ti Ni Nb electrode in different solutions has been studied. The Ti Ni Nb electrode can 46 45 9 46 45 9 Ž Ž . absorbrdesorb hydrogen in 3 M KOH aqueous and lithium in non-aqueous solution 1 M LiClO dissolved in a 50r50 vol.% vro 4 . mixture of ethylene carbonate and diethyl carbonate , respectively. It is assumed that lithium and hydrogen are incorporated in ...

Nickel-titanium-oxide (Ni-Ti-O) nanotube arrays (NTAs) prepared on nearly equiatomic NiTi alloy shall have broad application potential such as for energy storage and biomedicine, but their precise structure control is a great challenge because of the high content of alloying element of Ni, a non-valve metal that cannot form a compact electronic insulating passive layer when anodized. In the pre...

Shape memory alloys have again appealed a lot in recent years as new special materials of unusual macroscopic features that make them interesting for study and research as well as for their multifunctional application in various branches of techniques. Shape memory refers to the ability of certain plastic metals and alloys to regain their original shape during the heating process due to complet...

Timothy J. Rupert Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139; and Department of Mechanical and Aerospace Engineering, University of California, Irvine, California 92697 Jason R. Trelewicz and Christopher A. Schuh Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachus...

We have studied the electronic and magnetic properties of Fe-Pt, CoPt and Ni-Pt alloy systems in ordered and disordered phases. The influence of various exchange-correlation functionals on values of equilibrium lattice parameters and magnetic moments in ordered Fe-Pt, Co-Pt and Ni-Pt alloys have been studied using linearized muffin-tin orbital method. The electronic structure calculations for t...

The effects of Fe, Cr and thermal exposure on the microstructure mechanical properties Al-Si alloy were investigated in this work. results indicated that main phases Al-Si-Cu-Ni-Mg-(0.6–0.9%) Fe (wt. %) α-Al, Si, Al5Cu2Mg8Si6, Al3CuNi, Al7Cu4Ni, Al2Cu, AlFeSi at room temperature. size AlSiFe phase increased with increasing weight fraction Fe. shape Fe-rich changed from rod-like to star-like, fo...

The Ir-Fe and Ir-Ni alloy systems were studied over the whole composition range by means of the nuclear resonance absorption of the 73 keV y-rays of 193Jr and of the 14.4 keV y-rays of 57Fe. The magnetic hyperfine field at the Ir-nuclei in Ir-Ni alloys decreases approximately linearly with the Ir concentration from — 460 kOe at 4.2 K in very dilute alloys to zero at about 20 at.-% Ir. This beha...

The Earth’s solid inner core consists mainly of iron (Fe), alloyed with lighter elements, such as silicon (Si). Interpretation of seismic anisotropy and layering requires knowledge of the stable crystal structure in the inner core. We report ab initio density functional theory calculations on the free energy and vibrational stability of pure iron and Fe–Si alloys at conditions representative of...