Results 71 to 80 of about 87,366,173 (252)

Beyond Nanoporosity: A CO2‐Conditioned Glassy Matrix Contributes to the Brittle‐to‐Ductile Transition of Nanocellular Polyetherimide

Advanced Materials, EarlyView.
The mechanical performance of nanocellular polyetherimide cannot be explained by nanoporosity alone. It is shown that CO2 saturation and desorption leave a distinct mechanical signature in the glassy matrix before foaming. This matrix contribution provides a new route to understand and optimize the brittle to ductile transition in nanocellular polymers.
Félix Lizalde‐Arroyo, Frederik Van Loock, Victoria Bernardo, Tuuli Peltola, René Bes, Alberto Tena, Miguel Ángel Rodríguez‐Pérez, Judith Martín‐de León   +7 more
wiley   +1 more source

Experimental investigation on the rheology of fault rocks [PDF]

, 2014
The aim of this study is to explore and identify physical and chemical processes occurring during deformation of fault rocks under elevated pressures and temperatures where an interplay between brittle/frictional and viscous processes is expected.
Peč, Matěj
core   +1 more source

Thermoplastic Dielectric Coatings for Flexible Electrodynamic Dust Shields: Structural and Functional Performance

Advanced Materials Interfaces, EarlyView.
Thermoplastic attachment is introduced as a scalable surface coating strategy to improve the durability and dielectric reliability of flexible electrodynamic dust shields. By embedding chemically modified reduced graphene oxide (CMrGO) electrodes within thermoplastic laminates, mechanical degradation, abrasion damage, and vacuum‐induced electrical ...
Ide E. Onal, Emily A. Ryan, Luca Scifoni, Thomas M. Orlando, Álvaro Romero‐Calvo, Julie S. Linsey, Meisha L. Shofner   +6 more
wiley   +1 more source

Study of fractography of ferritic ductile iron at different temperatures and loading conditions

Materials Research Express
This study characterizes the fractography of ferritic ductile iron under various loads, including tensile, fatigue and bending, and impact conditions. The results indicate that ductile fracture is the primary mechanism observed during tensile testing at ...
Wenjie Wang, Zekun Wang, Zhiren Sun, Zhou Zhou, Kai Zhang, Li Ma, Yuwei Wang, Sen Yang, Zherong Huang, Kaikun Wang   +9 more
doaj   +1 more source

Mechanism study of brittle-to-ductile transition temperature in W-0.2 wt% Al2O3 alloy

Journal of Materials Research and Technology
W-0.2 wt% Al2O3 alloy plates were fabricated using composite powders prepared by the wet chemical method, followed by cold isostatic pressing, vacuum sintering, and hot-rolling.
Ziwen Zhao, Tielong Sun, Changji Wang, Hua Yu, Liya Cui, Caihong Dou, Yunchao Zhao, Cheng Zhang, Di Dong, Kunming Pan   +9 more
doaj   +1 more source

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Polyolefin ductile-brittle transition temperature predictions by machine learning

Frontiers in Materials
Polymers show a transition from ductile-to brittle fracture behavior at decreasing temperatures. Consequently, the material toughness has to be determined across wide temperature ranges in order to determine the Ductile-Brittle Transition Temperature ...
Florian Kiehas, Martin Reiter, Juan Pablo Torres, Michael Jerabek, Zoltán Major   +4 more
doaj   +1 more source

Ductile to brittle transition of fracture of a Zr-based bulk metallic glass: Strain rate effect

, 2016
Quasi-static and dynamic tensile experiments were conducted on a Zr-based bulk metallic glass at room temperature. A significant ductile-to-brittle transition was identified with increasing strain rate, based on the changes in the macroscopic fracture ...
Li G, Jiang F, Li MC, 蒋敏强, He L, Sun J, Jiang, F (reprint author), Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China.   +6 more
core   +1 more source

Wood‐Derived Nanocellulose‐Biocarbon Fresnel‐Zone Plate Lenses for Sub‐THz Frequency Applications

Advanced Materials Technologies, EarlyView.
Wood‐derived nanocellulose and lignin‐based biocarbon were combined to fabricate fully bio‐based Fresnel zone plate (FZP) lenses for sub‐terahertz frequencies. These sustainable FZP lenses exhibit low dielectric loss and high directivity, achieving performance comparable to that of metallic references, and remain functional under environmental stress ...
Riikka Haataja, Mikko Kokkonen, Niina Halonen, Sami Myllymäki, Umair Rafique, Mandeep Singh, Ossi Laitinen, Heli Jantunen, Kristiina Oksman, Henrikki Liimatainen   +9 more
wiley   +1 more source

Intrinsic factor controlling the deformation and ductile-to-brittle transition of metallic glasses

, 2014
The energetic driving force and resistance for shearing and cracking in metallic glasses (MGs) are quantitatively evaluated. A universal thermodynamic criterion is proposed for better understanding the intrinsic correlations between fracture toughness ...
Liu ZQ, Zhang ZF, Jiang MQ(蒋敏强), Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China., Wang WH   +4 more
core   +1 more source