Results 121 to 130 of about 398,792 (302)
Removing Oxide Layers and Retaining Oxide‐Free Steel Surfaces by Polishing in Oxygen‐Free Atmosphere
Advanced Engineering Materials, EarlyView.In this study, the efficacy of wet mechanical polishing under an oxygen‐free atmosphere for deoxidation and the retention of an oxide‐free steel surface are elucidated using X‐ray photoelectron spectroscopy. The methodology proved successful; however, the results were highly dependent on the preparation of the solvents used to clean the samples after ...
Friedrich Bürger +2 more
wiley +1 more source
INITIAL STAGES OF CARBON GENESIS IN THE UNIVERSE
Universitas Scientiarum, 2004 The formation possibility of the most widespread carbon compounds had been showed on the base of detonation nanodiamonds thermodynamic data. These reactions may play a key role in the life origin and in the atmosphere formation of the Solar system giant ...
A.L. Vereshchagin
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Мінеральні ресурси УкраїниThis article has a methodical orientation. There are discussed the features of the use of silt mineralogical methods in the search for native and placer deposits of diamonds.
V. T. Pidvysotskyi +3 more
doaj +1 more source
Helium isotopic ratios in carbonaceous chondrites: Significant for the early solar nebula and circumstellar diamonds? [PDF]
, 2001 Stepwise etching of acid-resistant residues from carbonaceous chondrites yields a new, extraordinarily low He isotopic ratio for phase Q that might represent early solar nebula composition.
Baur, H., Busemann, H., Wieler, R.
core
Influence of an Oxygen‐Free Atmosphere on Diamond‐Single‐Grain Scratching of Ti–6Al–4V
Advanced Engineering Materials, EarlyView.Single‐grain scratching of Ti–6Al–4V is investigated under controlled, oxygen‐free, and ambient atmospheres using a novel experimental setup with in situ high‐speed imaging. The approach enables direct observation of chip formation and adhesion under suppressed oxidation.
Berend Denkena +2 more
wiley +1 more source
The stuff of legend: diamonds and development in southern Africa [PDF]
This essay establishes four propositions. First, the diamond industry has been a positive force for development in southern Africa. Second, jewelry, among the most profitable segments of the industry, is a non-essential luxury, and accordingly, consumer ...
Noland, Marcus, Spector, Brooks
core +1 more source
Advanced Engineering Materials, EarlyView.New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold +2 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.Copper‐based composites enhanced with carbon feature convenient mechanical properties and favorable electric conductivity. Processing via deformation and thermomechanical treatments can introduce advantageous microstructures further enhancing their performance. Herein, copper–graphene powder‐based composites are directly consolidated via rotary swaging
Radim Kocich +3 more
wiley +1 more source
Microstructure Evolution of a VMnFeCoNi High‐Entropy Alloy After Synthesis, Swaging, and Annealing
Advanced Engineering Materials, EarlyView.The synthesis and processing (rotary swaging and annealing) of the novel VMnFeCoNi alloy is investigated, alongside the estimation of the grain size effect on hardness. Analysis of a wide grain size range of recrystallized microstructures (12–210 µm) reveals a low annealing twin density.
Aditya Srinivasan Tirunilai +6 more
wiley +1 more source
Мінеральні ресурси України, 2016 Zoning of areas by degree of their prospectivity was carried out by outlined complex investigations and generalization of available material on investigating diamond from modern placers of Central-Siberian sub-province and their comparison with crystals ...
M. M. Zinchuk, V. I. Koptil
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