Results 201 to 210 of about 540,123 (267)

Metal-free para-selective C-H amination and azidation of N-arylhydroxylamines. [PDF]

Nat Commun
Bai Y, Jiang HM, Xu W, Xu LP, Gao H.
europepmc   +1 more source

Creep Properties and Deformation Mechanism of Additively Manufactured NiAl‐CrMo Composites

Advanced Engineering Materials, EarlyView.
Additively manufactured NiAl‐CrMo composites contain numerous interfaces and cell boundaries that control their creep response. At 700°C under high applied stress, creep is dominated by dislocation‐controlled power‐law mechanisms. At 800°C–900°C and lower stresses, creep is primarily diffusion‐controlled along cell boundaries.
Jan Vollhüter, Andreas Bezold, Johan Westraadt, Katharina Fiegl, Subham Chattoraj, Benjamin Wahlmann, Carolin Körner, Michael Mills, Mathias Göken, Steffen Neumeier   +9 more
wiley   +1 more source

Green chemistry spotlight: metal-free organic transformations mediated by potassium persulfate. [PDF]

RSC Adv
Venkatesh R, Chaudhary P.
europepmc   +1 more source

Bioinspired Shape‐Memory Hook Fasteners With Programmable Interlocking and Silent Release

Advanced Engineering Materials, EarlyView.
Bioinspired hook fasteners made from epoxy shape‐memory polymers are shown to switch between strong, secure attachment and gentle, silent release when heated. By combining programmable geometry and material response, these adaptive fasteners outperform commercial systems in strength and noise control, enabling new solutions for robotics, medical ...
Maria I. Vallejo Ciro, Manuel J. Carvajal Loaiza, Rahaf Homssi, Vanessa Restrepo   +3 more
wiley   +1 more source

An efficient transition metal-free indolylation on 6-chloropurine ribonucleosides and photophysical studies of conjugated nucleosides. [PDF]

RSC Adv
Mondal SK, Singh S, Pal S.
europepmc   +1 more source

Copper Nanocrystallization in Anodic Oxide Films of Ti–Cu‐Based Bulk Metallic Glass and Its Effect on the Corrosion Resistance and Cytocompatibility

Advanced Engineering Materials, EarlyView.
Viktoriia Shtefan, Thorgund Nemec, Ute Hempel, Annett Gebert and coworkers demonstrate that anodic treatment of Ti–Cu‐based metallic glass in a nontoxic pyrophosphate electrolyte forms a protective bilayered Ti/Zr‐oxide film enriched with Cu nanocrystals.
Viktoriia Shtefan, Nora Fernández Navas, Thorgund Nemec, Ivan Kaban, Ute Hempel, Andrea Voss, Volker Hoffmann, Darius Pohl, Annett Gebert   +8 more
wiley   +1 more source

Highly efficient heterogeneous thermal catalysis for noble-metal-free hydrogen production from formic acid. [PDF]

Nat Commun
Qiu L, Yao L, Wang P, Jiang Z, Li J, Li Y, Li Y, Wu Z, Nasir MS, Wang D, Wang X, Huang Z, Zhou B.   +12 more
europepmc   +1 more source

Evaluation of Plasticity and Creep Parameters From Tensile Stress–Strain Data for a Range of Strain Rates

Advanced Engineering Materials, EarlyView.
This plot compares experimental tensile stress–strain curves (with 4 different strain rates) and corresponding modelled curves (obtained using the optimised sets of Voce and Miller–Norton parameter values shown). The inferred M‐N values, characterizing the creep, are very similar to those obtained via conventional creep testing.
S. Ooi, R. P. Thompson, T. W. Clyne
wiley   +1 more source

Designed Metal-Free Quasi-1D Crystals with Giant Birefringence. [PDF]

Chemistry
Li Y, Lee J, Ok KM.
europepmc   +1 more source

The emergence of metal-free molecular perovskites: challenges and opportunities.

Mater Horiz
Muscarella LA, Bravetti G, Milić JV.
europepmc   +1 more source