Results 71 to 80 of about 10,248,710 (343)

Research on gradient aging behaviors of asphalt and decay characteristics of its properties under complex UV radiation conditions based on component diffusion and aging kinetics theory.

PLoS ONE
To gain a more comprehensive understanding of UV aging process of base asphalt and SBS polymer modified asphalt, the gradient aging behaviors of asphalt and decay characteristics of their properties under different UV radiation conditions were ...
Hengbin Liu, Zhongnan Tian, Ying Fang, Zhengqi Zhang, Yulong Zhao, Peng Hu, Kun Wang   +6 more
doaj   +1 more source

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Engineered Mycelial Scaffolds With Tunable Ultraviolet Protection, Wettability, Thermal Stability, and Spatial Mechanics

Advanced Engineering Materials, EarlyView.
Fungal mycelia grown into biodegradable scaffolds and infused with titania nanoparticles show enhanced ultraviolet shielding, thermal protection, and surface nonwettability. Properties were tuned by drying methods, revealing structure–function relationships.
Juwon S. Afolayan, Xin Zhang, Carole C. Perry   +2 more
wiley   +1 more source

Influence of variable intensity ultraviolet on the performance of SBS modified asphalt

Case Studies in Construction Materials
Previous scholars studied UV aged asphalt performance under constant UV intensity. This study proposed a method of UV aged asphalt based on the time-varying UV intensity, which is more capable of realistically simulating the UV aging of asphalt under ...
Xiaobing Zhou, Dongdong Ge, Songtao Lv, Xiaochuan Wang, Yuanbo Li, Zihao Ju   +5 more
doaj   +1 more source

The Nature of LINERs [PDF]

, 1999
We present $J$-band ($1.15-1.35 \mu$m) spectroscopy of a sample of nine galaxies showing some degree of LINER activity (classical LINERs, weak-[O {\sc i}] LINERs and transition objects), together with $H$-band spectroscopy for some of them.
Almudena Alonso‐Herrero, Dekker H., Forbes D. A., Garcia-Vargas M. L., George H. Rieke, Gonzalez-Delgado M. R., Gonzalez-Delgado M. R., Heckman T. M., Hummer D. G., Jones H. R. A., Jones H. R. A., Joseph C. Shields, Lumsden S. L., Marcia J. Rieke, Nussbaumer H., Oliva E., Simpson C., Tadhunter C. N., Veron P., Veron-Cetty M.-P.   +19 more
core   +2 more sources

Effect of UV-aging on the mechanical and fracture behavior of low density polyethylene

, 2020
In polyethylene, a transient, oxidation-induced strengthening is often observed over a narrow range of UV radiation dose. In addition, plastic deformation may not be volume-preserving due to cavitation.
Ana K. Rodriguez, B. Mansoor, G. Ayoub, X. Colin, A. Benzerga   +4 more
semanticscholar   +1 more source

Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

Advanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff, Finn‐Lennard Janthur, Sascha Zimmermann, Sarah Seffer, Jörg Hermsdorf, René Gustus, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Christian Klose   +9 more
wiley   +1 more source

Performance Comparison of Different Types of Anti-UV Aging Agents in Modified Asphalt

Buildings
There are many types of asphalt anti-UV aging agents, and the differences in their UV resistance mechanisms result in varying degrees of UV aging resistance. This study utilized three types of anti-UV aging agents to modify asphalt.
Zhengwei He, Dongdong Ge, Jianping Xian, Qian Liu, Xingyu Hu, Zihao Ju, Songtao Lv   +6 more
doaj   +1 more source

Surface behaviors of EPDM rubber and mechanism of nano anti-aging agent under UV condition

工程科学学报, 2015
Based on ultraviolet (UV) accelerated aging tests, aging processes were tracked to study the effects of nano-TiO2 antiaging agent on the surface aging behaviors and anti-aging ability of ethylene-propylene-diene monomer (EPDM).
CHEN Hong-ting, GAO Jin, LU Lin, LI Xiao-gang, FANG Yue-hua, GUO Chun-yun   +5 more
doaj   +1 more source

Hybrid Chitosan–TiO₂ Nanocomposite Impregnated in Type A-2186 Maxillofacial Silicone Subjected to Different Accelerated Aging Conditions: An Evaluation of Color Stability

Nanomaterials, 2023
This study explores the impact of the incorporation of a chitosan–TiO2 nanocomposite on the color stability of pigmented room-temperature vulcanization maxillofacial silicone under various accelerated aging conditions.
Faten K. Al-Kadi, Jwan F. Abdulkareem, Bruska A. Azhdar   +2 more
doaj   +1 more source