Results 111 to 120 of about 3,300,976 (283)

Defect‐Engineered Microwave‐Responsive Ni@C Composites From Waste PET for Catalytic Plastic Upcycling

Advanced Materials, EarlyView.
A circular upcycling strategy transforms waste poly(ethylene terephthalate) bottles into microwave‐responsive Ni@C catalyst featuring lattice‐distorted nickel cores and defective carbon shells. These strain‐rich heterointerfaces enhance dielectric loss and promote localized microwave hotspots, accelerating peroxymonosulfate activation and polymer‐chain
Xiao Lu, Shiying Ren, Jingkai Lin, Kunsheng Hu, Yalan Mo, Shaobin Wang, Wenjie Tian, Xiaoguang Duan   +7 more
wiley   +1 more source

Investigation of size effect on flow stress of Cu-3wt.%Ag-0.5 wt%Zr thin sheets at room and cryogenic temperature based on geometrically necessary dislocation evolution behavior

Journal of Materials Research and Technology
The influence of the grain sizes ranging from 23.4 to 69.2 μm on mechanical properties of Cu-3wt.%Ag-0.5 wt%Zr thin sheets was investigated by conducting uniaxial tensile experiments at room temperature (RT 298 K) and cryogenic temperature (CT 77 K).
Han Wang, Peng Zhang, ChuanJie Wang, Qiang Zhu, Gang Chen   +4 more
doaj   +1 more source

Strain gradients and geometrically necessary dislocations in deformed ice single crystals

Scripta Materialia, 2003
Abstract Hard X-ray diffraction experiments were performed on ice single crystals deformed in torsion. This work shows the relationship between the density of geometrically necessary dislocations and strain gradients. The torsion strain appears to be totally accommodated by geometrically necessary basal screw dislocations.
Montagnat, Maurine, Duval, Paul, Bastie, Pierre, Hamelin, Bernard   +3 more
openaire   +1 more source

Atomistic Study for Geometrically Necessary Dislocation and Nanoindentation Size Effects

, 2017
壓痕試驗為微觀及奈米尺度中最為普遍之材料強度檢測方式，當壓痕深度小至微米尺度時，硬度會隨著壓痕深度降低而升高，這種現象稱之為「壓痕尺寸效應」，Nix and Gao以幾何必要差排理論成功的解釋在微米尺度壓痕試驗的尺寸效應，但是在將其理論應用至奈米尺度時，硬度的預測則有高估的情形。近年來，許多研究紛紛針對此現象提出不同的看法，嘗試利用其他變數修正並解釋壓痕尺寸效應在奈米尺度下的行為。本研究將提出一在原子尺度模擬下量測差排密度的方法，並利用Taylor dislocation ...
Lin, Kuan-Po, 林冠伯
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Interfacial Failure and Self‐Healing in Solid‐State Batteries

Advanced Materials, EarlyView.
Dynamic interfacial self‐healing offers an adaptive route to mitigate coupled mechanical, chemical, and electrochemical degradation in solid‐state batteries. This review connects evolving interfacial failure mechanisms with physical‐flow, chemical‐restoration, stimuli‐responsive, and electric‐field‐assisted repair strategies, highlighting targeted self‐
Xinxin Zhu, Tengfei Dai, Wendi Dou, Zhiheng Li, Kaihua Wen, Yanqun Lv, Ming Zhao, Jun Lu, Zaiping Guo   +8 more
wiley   +1 more source

Irreversible evolution of dislocation pile-ups during cyclic microcantilever bending

Materials & Design
In single crystals, plastic deformations are predominantly governed by dislocation movement and interactions. The group of dislocations that creates strain gradients, known as geometrically necessary dislocations (GNDs), also deterministically ...
Dávid Ugi, Kolja Zoller, Kolos Lukács, Zsolt Fogarassy, István Groma, Szilvia Kalácska, Katrin Schulz, Péter Dusán Ispánovity   +7 more
doaj   +1 more source

Investigation of Dynamic Recrystallization of NiTi Shape Memory Alloy Subjected to Local Canning Compression

Metals, 2017
Physical mechanism for dynamic recrystallization of NiTi shape memory alloy subjected to local canning compression at various temperatures, 600, 700 and 800 °C, was investigated via electron backscattered diffraction experiments and transmission electron
Yanqiu Zhang, Shuyong Jiang, Li Hu
doaj   +1 more source

Metastable Polymers for Circular 3D Printing

Advanced Materials, EarlyView.
3D‐printed polymers are usually permanent and hard to recycle. Here, metastable polymers are designed to fall apart on demand. A chemical trigger unzips the printed material back into its original building blocks within minutes at room temperature.
Johannes Markhart, Philipp Mainik, Eva Blasco   +2 more
wiley   +1 more source

In-situ tensile deformation of multiphase stainless steel

Journal of Materials Research and Technology
In this work, the microstructural evolution of a multiphase stainless steel with martensite (α′), delta-ferrite (δ) and reversed austenite (RA) during tensile deformation was systematically investigated by combining in-situ EBSD and TEM techniques, with ...
Zixiang Wu, Kaifeng Han, Yijing Gao, Hong Chen, Ruiyang Liang, Lirong Xiao, Hao Zhou   +6 more
doaj   +1 more source

On modeling of geometrically necessary dislocation densities in plastically deformed single crystals

, 2013
A computational method for strain gradient single crystal plasticity is presented. The method accounts for both recoverable and dissipative gradient effects.
Kysar, Jeffrey W., Niordson, Christian Frithiof   +1 more
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