Results 21 to 30 of about 6,311 (245)

Effect of Laser Deoxidation on Adhesive‐Bonded Aluminum in an Oxygen‐Free Atmosphere

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates laser ablation of aluminum under oxygen‐free conditions. The goal is to produce oxide‐free substrates that enable improved adhesive bonding with epoxy. Optimized laser parameters (90% overlap, 300 µJ) combined with oxide‐free substrates result in the highest tensile strength of the adhesive bond.
Sandra Gerland   +5 more
wiley   +1 more source

Caddo Ceramic Assemblages from Sites in the Ayish and Palo Gaucho Bayou Basins, San Augustine County, Texas [PDF]

open access: yes, 2016
In 1939 and 1940, G. E. Arnold recorded a number of archaeological sites in and around San Augustine, in East Texas, as part of a Works Progress Administration-funded (WPA) archaeological survey of East Texas.
Perttula, Timothy K.
core   +1 more source

Influence of an Oxygen‐Free Atmosphere on Diamond‐Single‐Grain Scratching of Ti–6Al–4V

open access: yesAdvanced 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

Continued Shovel Test Investigations at the Historic Caddo Allen Phase Bowles Creek Site (41CE475), Cherokee County, Texas [PDF]

open access: yes, 2017
The Bowles Creek site (41CE475) on Bowles Creek in the Neches River basin in East Texas (Figure 1) is an important and well-preserved Historic Caddo Allen phase habitation site on a low alluvial rise not far north of the current channel of Bowles Creek ...
Perttula, Timothy K., Stingley, Kevin
core   +1 more source

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

open access: yesAdvanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa   +9 more
wiley   +1 more source

Upper Neches River Basin Caddo Ceramic Vessels from Anderson, Cherokee, and Henderson Counties in East Texas [PDF]

open access: yes, 2016
The National Museum of Natural History, Smithsonian Institution (NMNH) has extensive collections of artifacts from ancestral Caddo sites in the Caddo area.
Perttula, Timothy K.
core   +1 more source

Corrosion and Process Analysis of a Preoxidized MgO Recyclate‐Based Cermet Anode in Laboratory‐Scale Na‐Cryolite Molten Salt Electrolysis of Aluminum at 1000°C

open access: yesAdvanced Engineering Materials, EarlyView.
EDX elemental map of the pre‐oxidized MgO–steel cermet anode cross section after electrolysis. The development of inert anodes for aluminum electrolysis remains challenging due to the high corrosivity of cryolite‐based melts at 950°C–1000°C. This study investigates the corrosion and process behavior of a carbon‐free MgO–steel cermet anode derived from ...
Alexander Adamczyk   +7 more
wiley   +1 more source

Fire and memory: transforming place using fire at henge monuments [PDF]

open access: yes, 2017
Henges — Late Neolithic to Early Bronze Age earthwork monuments — often have long life-histories of reuse and rebuilding over generations. At some sites, fire-lighting and the deposition of fire-altered materials played a significant role in certain ...
Younger, Rebecca
core   +1 more source

Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy

open access: yesAdvanced Engineering Materials, EarlyView.
This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb   +6 more
wiley   +1 more source

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