Results 81 to 90 of about 179,629 (298)

Permanent porous hydrogen-bonded frameworks with two types of Brønsted acid sites for heterogeneous asymmetric catalysis

Nature Communications, 2019
The search for porous materials with strong Brønsted acid sites for challenging chemical reactions has been of significant interest, but remains challenging.
Wei Gong, Dandan Chu, Hong Jiang, Xu Chen, Yong Cui, Yan Liu   +5 more
doaj   +1 more source

XRD and EDS Investigations of Metal Matrix Composites and Syntactic Foams [PDF]

, 2008
Metal matrix composites (MMCs) of different composition were produced and investigated by X-ray diffraction (XRD) and energy dispersive spectrometry (EDS) analysis.
Dobránszky, János, Németh, Árpád, Orbulov, Imre Norbert   +2 more
core  

Manufacturing Continuous Fiber‐Reinforced Printing Filaments: Development of a Post‐Consolidation Unit

Advanced Engineering Materials, EarlyView.
A novel, temperature‐controlled post‐consolidation unit is developed to test its potential to improve the melt impregnation process used to manufacture continuous fiber‐reinforced filaments for additive manufacturing of high‐performance thermoplastics.
Daniel Beermann, Patrick Schiebel, David May   +2 more
wiley   +1 more source

Sixteen isostructural phosphonate metal-organic frameworks with controlled Lewis acidity and chemical stability for asymmetric catalysis

Nature Communications, 2017
Asymmetric synthesis predominantly falls within the realm of homogeneous catalysis. Here, the authors synthesized 16 chiral metal–organic frameworks differing in the nature of the transition metal and demonstrate their excellent stability, catalytic ...
Xu Chen, Yongwu Peng, Xing Han, Yan Liu, Xiaochao Lin, Yong Cui   +5 more
doaj   +1 more source

Unidirectional Tape‐Based Composites from Hemp and Pineapple Leaf Fiber: Mechanical Performance in Conventional and Bio‐Based Matrices

Advanced Engineering Materials, EarlyView.
The study investigates novel semi‐finished products made of unidirectionally arranged hemp or pineapple leaf fiber‐reinforced composites produced from different matrices. The materials are analyzed in terms of their mechanical and interfacial properties and void content.
Nina Graupner, Raja Bade, Valentin Ackermann, Roja M. Baumann, Corvin Bischoff, Jona F. Ebeling, Oskar Glenz, Marlo Groh, Jonathan Groth, Finja Hiller, Tom Hirschmüller, Felix Menke, Syntcha Ngantchou Lecdou, Mika Ohler, Daniel Rafii Vardiny, Darius Richter, Dario Röper, Henrik Schumacher, Theresa Stein, Benjamin Vorbeck, Elisabeth Wermter, Kay Kölzig, Jörg Müssig   +22 more
wiley   +1 more source

Radiative Cooling Materials for Extreme Environmental Applications

Nano-Micro Letters
Highlights Heat exchange mechanisms for enhancing cooling performance and environmental tolerance are elucidated. Challenges in extreme environments, along with the corresponding anti-environmental radiative cooling materials and micro-nano structures ...
Jianing Xu, Wei Xie, Hexiang Han, Chengyu Xiao, Jing Li, Yifan Zhang, Shaowen Chen, Binyuan Zhao, Di Zhang, Han Zhou   +9 more
doaj   +1 more source

Nanostructured nickel film deposition on carbon fibers for improving reinforcement-matrix interface in metal matrix composites [PDF]

, 2017
The issues in dispersing any form of carbon in metal matrix is the major problem in the field of metal matrix composites with carbon reinforcement (MMCcr).
Genova, Virgilio, Marini, Danilo, Marra, Francesco, Pulci, Giovanni, Valente, Marco   +4 more
core   +1 more source

Nitride‐Reinforced Metal Matrix Nanocomposite Powders Production by Plasma‐Assisted Thermochemical Treatment of Intermetallic Powders

Advanced Engineering Materials, EarlyView.
This study proposes a new methodology for producing metal matrix nanocomposites in the solid state. The process involves the plasma‐assisted thermochemical treatment of metallic alloy powders. As a proof‐of‐concept, TiN nanoparticles are synthesized directly on the surface of FeTi intermetallic powder particles, enabling the development of the ...
Deivison Daros Paim, Antônio Rogério de Souza, Tatiana Bendo, Aloisio Nelmo Klein, Rodrigo Perito Cardoso   +4 more
wiley   +1 more source

Effect of intrinsic heat treatment on the microstructure and mechanical properties of Al-Cu alloy fabricated by wire arc directed energy deposition

Scientific Reports
Wire arc directed energy deposition (WADED) represents an appealing approach for producing complex, large-scale, and three-dimensional metallic components from metallic wire, guided by computer-aided design models.
Bin Yang, Xiaodong Li, Shuang Lei, Yating Li, Xinyuan Jin, Guoping Zhao, Xianfeng Li   +6 more
doaj   +1 more source

Lightweight metallic matrix composites. Development of new composites material reinforced with carbon structures [PDF]

, 2019
Carbon nano/micro-structures used as fillers in metallic lightweight alloys matrix composites are receiving considerable attention in scientific research and industrial applications.
Genova, Virgilio, Marini, Danilo, Marra, Francesco, Pulci, Giovanni, Quitadamo, Alessia, Valente, Marco   +5 more
core   +1 more source