Article
Chemistry, Physical
Yury G. Kolyagin, Alexander V. Yakimov, Dmitry S. Zasukhin, Irina I. Ivanova
Summary: In this study, an advanced approach based on pure shift solid-state Si-29 NMR spectroscopy was proposed for the structural investigation of zeolitic materials with polymorphs. The results showed that this approach could accurately determine the polymorph composition and overcome the interference of stacking disorder and polymorphism. The study also discovered the differences in polymorph composition under different synthesis routes.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Yury G. Kolyagin, Alexander Yakimov, Dmitry S. Zasukhin, Irina I. Ivanova
Summary: Stacking disorder and polymorphism in zeolite and zeolite-like materials pose challenges for their structural characterization. This work presents an advanced approach using pure shift solid-state 29Si nuclear magnetic resonance (NMR) spectroscopy to investigate the structure of zeolitic materials with intergrown polymorphs. The findings demonstrate that pure shift solid-state Si-29 NMR is a superior tool for elucidating polymorphism in zeolites.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Jeffrey M. Wheeler
Summary: Meteorites have a unique microstructure called the Widmanstatten structure, which was mapped using mechanical phase mapping in the Taza meteorite to statistically determine properties of different phases. Five microstructural phases were identified and characterized, with mechanical phase maps showing superior contrast in two phases compared to EDX measurements.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Chemistry, Physical
Aneta Wardak, Witold Chrominski, Anna Reszka, Dominika Kochanowska, Marta Witkowska-Baran, Malgorzata Lewandowska, Andrzej Mycielski
Summary: This study presents a defect analysis in Cd and Te inclusion regions within Bridgman-grown Cd0.95Mn0.05Te crystals for nuclear detectors. Contrary to Cd inclusions causing microcracks, Te inclusions do not generate defects but induce higher stresses. The higher stress from Te inclusions has a smaller impact on charge carrier transport in detectors compared to Cd inclusions, as confirmed by mu tau product measurements.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Arjun Rana, Chen-Ting Liao, Ezio Iacocca, Ji Zou, Minh Pham, Xingyuan Lu, Emma-Elizabeth Cating Subramanian, Yuan Hung Lo, Sinead A. Ryan, Charles S. Bevis, Robert M. M. Karl Jr, Andrew J. Glaid, Jeffrey Rable, Pratibha Mahale, Joel Hirst, Thomas Ostler, William Liu, Colum M. O'Leary, Young-Sang Yu, Karen Bustillo, Hendrik Ohldag, David A. Shapiro, Sadegh Yazdi, Thomas E. Mallouk, Stanley J. Osher, Henry C. Kapteyn, Vincent H. Crespi, John V. Badding, Yaroslav Tserkovnyak, Margaret M. Murnane, Jianwei Miao
Summary: The researchers successfully created 138 stable magnetic monopoles on a ferromagnetic meta-lattice and used soft X-ray vector ptycho-tomography to determine their magnetization vector and emergent magnetic field. The study found that the distances between monopole-anti-monopole pairs, monopole-monopole pairs, and anti-monopole-anti-monopole pairs were 18.3 +/- 1.6 nm, 36.1 +/- 2.4 nm, and 43.1 +/- 2.0 nm, respectively. This work demonstrates the potential of ferromagnetic meta-lattices as a platform for studying the interactions and dynamics of magnetic monopoles, and the broad application of soft X-ray vector ptycho-tomography for quantitatively imaging 3D vector fields in magnetic and anisotropic materials at the nanoscale.
NATURE NANOTECHNOLOGY
(2023)
Article
Chemistry, Physical
M. A. Mazo, A. C. Caballero, J. Rubio
Summary: In this study, cheap, abundant, and easily-obtained carbon fillers such as graphite and carbon black were successfully incorporated into a silicon oxycarbide matrix to obtain dense crack-free bulk composites with enhanced electrical and thermal conductivities. Raman parameters were crucial for understanding the electronic and/or phonon transport in the composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
T. E. Whitfield, N. L. Church, H. J. Stone, N. G. Jones
Summary: Refractory metal high entropy superalloys (RSA) are being developed for high temperature structural applications. However, recently the microstructures of several RSA have been shown to be unstable, precipitating potentially deleterious intermetallic phases during prolonged exposure at elevated temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Nitish Bibhanshu, Gyan Shankar, Satyam Suwas
Summary: Hot deformation and softening response of titanium aluminide Ti-48Al-2V-0.2B were investigated, with microstructural changes observed at different strain rates and temperatures. Deformation in different phase fields led to various mechanisms, such as dynamic recrystallization and cavitation along grain boundaries at certain temperatures. These findings provide insights into the softening behavior of the alloy under different deformation conditions.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Li Fan, Zelin Wang, Yuxiang Lu, Jianguang Zhou
Summary: This study introduces a staged loss-driven neural networks model architecture to transform low-resolution SEM images into super-resolved ones. Experimental results show that compared with other advanced approaches, our model achieves satisfactory results.
Article
Engineering, Mechanical
Changshuai Shi, Kailin Chen, Xiaohua Zhu, Daqi Fu, Yuekui Qi, Jianan Li, Feilong Cheng
Summary: The study revealed that the failure mechanism of SET in laboratory experiments is mainly attributed to tube defects causing rupture failure, with metal materials 316L and 304 being safer and more reliable compared to 20G and SA106b. Ensuring a tube wall thickness of more than 3.6 mm is crucial in preventing failure, while the number of rubber rings and defect length have minimal impact on bulging performance.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Multidisciplinary
Gaurav Dak, Sachin Sirohi, Chandan Pandey
Summary: This study examined the microstructure and mechanical properties of a dissimilar laser beam welded joint between ferritic/martensitic P92 steel and 304L austenitic stainless steel. It was found that the dissimilar joint exhibited a high level of inhomogeneity in its microstructure. The effect of this inhomogeneity on the mechanical properties, such as microhardness and impact strength, of the welded joint was discussed. The results showed that the welded joint met the requirements for both as-weld and post-weld heat treatment situations, demonstrating a satisfactory combination of tensile strength and impact strength.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2022)
Article
Chemistry, Physical
S. C. H. Llewelyn, L. R. Owen, H. Y. Playford, N. G. Jones, D. Dye, M. C. Hardy, H. J. Stone
Summary: This study examined the effects of Ni:Co ratio variation on the lattice misfit of NiCo-5Al-5Ti-15Cr alloys over a wide temperature range. Different alloy compositions were prepared and aged at 800 degrees C, and neutron diffraction was used to determine the lattice parameters. The results showed that the lattice misfit decreased with increasing temperature for alloys with Co content of 0-47 at%, and the misfit increased systematically with increasing Co content up to 38 at%. The alloy with 47Co exhibited lower misfit values than the 38Co alloy at temperatures up to 700 degrees C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Mechanical
Changshuai Shi, Kailin Chen, Xiaohua Zhu, Daqi Fu, Yuekui Qi, Feilong Cheng, Jianan Li
Summary: This study investigates the mechanical properties and corrosion behavior of 20G and 316L materials in solid expandable tubular (SET) experiments. The results indicate that the corrosion resistance of 316L SET is the strongest among the materials tested.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Chemistry, Physical
Paul M. Souza, Giribaskar Sivaswamy, Aurik Andreu, Salaheddin Rahimi
Summary: Secondary hot-working is crucial for microstructural modification of dual phase titanium alloys to tailor mechanical properties. However, industrial scale manufacturing often poses challenges due to a narrow processing window. Cyclic thermal treatment (CTT) is emerging as a potential technology for microstructure modification in Ti-6Al-4V, reducing mechanical work in the alpha + beta region. This study summarizes the CTT investigations conducted on wrought Ti-6Al-4V alloy to develop different initial microstructures and incorporates a JMAK model into DEFORM (R) software for microstructure evolution prediction.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Agata Mlonka-Medrala, Malgorzata Sieradzka, Aneta Magdziarz
Summary: This study analyzed the thermal upgrading of hydrochar through steam gasification to produce carbon-rich material with developed active surface area. The results show potential applications for proper management of mixed wastes.
