Results 81 to 90 of about 148,639 (308)
A status review of NASA's COSAM (Conservation Of Strategic Aerospace Materials) program [PDF]
The use and supply of strategic elements in nickel base superalloys for gas turbine engines are reviewed. Substitution of strategic elements, advanced processing concepts, and the identification of alternate materials are considered.
Stephens, J. R.
core +1 more source
Environmental variability and heavy metal concentrations from five lagoons in the Ionian Sea (Amvrakikos Gulf, W Greece) [PDF]
, 2016 Background: Coastal lagoons are ecosystems of major importance as they host a number of species tolerant to disturbances and they are highly productive. Therefore, these ecosystems should be protected to ensure stability and resilience.
Apostolaki, Eugenia T +11 more
core +3 more sources
Thermoreflectance Detection of Point Defects Resulting from Focused Ion Beam Milling
Advanced Engineering Materials, EarlyView.Focused ion beam (FIB) milling is a common tool for nanoscale material processing, however irradiation damage, redeposition, and contamination can occur. We use several characterization tools to show FIB‐induced effects beyond 1 mm from the milled area.
Thomas W. Pfeifer +3 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt +8 more
wiley +1 more source
DataStrategic metals are indispensable for meeting the needs of modern society. It is then necessary to reassess the potential of such metals in Europe.
Marjolène Jatteau +5 more
doaj +1 more source
Asteroid 1986 DA: Radar evidence for a metallic composition [PDF]
Radar observations of the near-Earth asteroid 1986 DA were carried out at the Arecibo Observatory in April 1986, two months after its discovery. Radar results are consistent with the hypothesis that 1986 HA is a piece of NiFe metal derived from the ...
Campbell, D. B. +6 more
core +1 more source
HOW DOES CHINA FARE ON THE RUSSIAN MARKET? IMPLICATIONS FOR THE EUROPEAN UNION. Bruegel Working Paper Issue 08 November 2019 [PDF]
, 2019 China's economic ties with Russia are deepening, particularly in terms of trade and cross-border lending, but less so in terms of Chinese foreign direct investment in, or portfolio fl ows to, Russia.
Garcia Herroro, Alicia, Xu, Jianwei
core
Advanced Engineering Materials, EarlyView.The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi +3 more
wiley +1 more source
Bio-Reclamation of Strategic and Energy Critical Metals from Secondary Resources
Metals, 2017 Metals with an average crustal abundance of <0.01 ppm, which are high in supply shortage due to soaring demand, can, under the excessive environmental risk and <1% recycling rate of their production, be termed as ‘critical’ in a limited geo ...
Sadia Ilyas +4 more
doaj +1 more source
LabEx RESSOURCES21, strategic metals of the XXIst century
, 2023 LabEx RESSOURCES21 is a research projects funded in 2011 by the Agence National de la Recherche (ANR) with several Integrated project on Lithium, on Nickel, on Rare Earth Elements, Environment and Mining -special focus on French Guiana And more Education and ...
Chagnes, Alexandre +4 more
openaire +1 more source