UNT Scholarly Works - 20 Matching Results

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open access

Phase-Specific Damage Tolerance of a Eutectic High Entropy Alloy

Description: Article describes how phase-specific damage tolerance was investigated for the AlCoCrFeNi2.1 high entropy alloy with a lamellar microstructure of L12 and B2 phases. Distinct differences in micro-scale deformation mechanisms were reflected in post-compression fractography, with L12-phase cantilevers showing typical characteristics of ductile failure, including the activation of multiple slip lanes, shear lips at the notch edge, and tearing inside the notch versus quasi-cleavage fracture with cle… more
Date: November 30, 2023
Creator: Jha, Shristy; Mishra, R. S. & Mukherjee, Sundeep
Partner: UNT College of Engineering
open access

A pseudo thermo-mechanical model linking process parameters to microstructural evolution in multilayer additive friction stir deposition of magnesium alloy

Description: Article describes how additive friction stir deposition has been proposed as a disruptive manufacturing process; involving complex thermo-mechanical mechanisms during multilayer material deposition. The primary motivation for development of the model was to seek an understanding of thermo-mechanical mechanisms and their impact on microstructural evolution during additive friction stir deposition.
Date: November 24, 2022
Creator: Sharma, Shashank; Krishna, Mani K. V.; Radhakrishnan, M.; Pantawane, Mangesh V.; Patil, Shreyash M.; Joshi, Sameehan et al.
Partner: UNT College of Engineering
open access

Stability and degradation in triple cation and methyl ammonium lead iodide perovskite solar cells mediated via Au and Ag electrodes

Description: Article focuses on the fact that there are no clear mechanisms for the interaction of electrode-induced absorber degradation pathways. Furthermore, the authors hypothesize that the formation of AgI in the PSCs, leads to corrosion of the perovskite absorber, as opposed to the benign AuI when Au electrodes are used in the solar cell stack.
Date: November 3, 2022
Creator: Kranthiraja, Kakaraparthi; Parashar, Mritunjaya; Mehta, Ravindra K.; Aryal, Sujan; Temsal, Mahdi & Kaul, Anupama
Partner: UNT College of Engineering

Plexcitonic interactions in spherical and bi-pyramidical Au nanoparticles with monolayer WSe₂

Description: Article describes how plasmons associated with zero-dimensional (0D) metal nanoparticles and their synergistic interactions with excitons in two-dimensional (2D) semiconductors offer opportunities for remarkable spectral tunability not otherwise evident in the pristine parent materials, which necessitates an in-depth study elucidating the nature of the plasmonic and excitonic interactions, jointly referred to as plexcitons in order to understand the foundational aspects of the light–matter inte… more
Date: November 15, 2022
Creator: Jayanand, Kishan & Kaul, Anupama
Partner: UNT College of Engineering
open access

Additive friction stir deposition: a deformation processing route to metal additive manufacturing

Description: This article outlines key advantages of additive friction stir deposition, e.g. rendering fully-dense material in the as-printed state with fine, equiaxed microstructures, identifies its niche engineering uses, and points out future research needs in process physics and materials innovation.
Date: November 24, 2020
Creator: Yu, Hang Z. & Mishra, Rajiv
Partner: UNT College of Engineering
open access

Wear and friction of composites of an epoxy with boron containing wastes

Description: Article describes development of polymer composites based on epoxy resins containing up to 50 wt. % of boron wastes and determined their pin-on-disk dynamic friction, wear, Shore D hardness and surface roughness.
Date: November 18, 2014
Creator: Uygunoğlu, Tayfun; Brostow, Witold, 1934- & Gunes, Ibrahim
Partner: UNT College of Engineering
open access

Tribologically induced nanolaminate in a cold-sprayed WC-reinforced Cu matrix composite: a key to high wear resistance

Description: Article describes an experiment where a self-organized 2D nanolaminate with an average lamella thickness of ~22 nm was formed in the subsurface of a cold-sprayed WC-reinforced metal matrix composite (MMC) Cu-MoS2-WC during oscillatory sliding, resulting in more stable friction and improved wear resistance.
Date: November 15, 2019
Creator: Zhang, Yinyin; Choudhuri, Deep; Scharf, Thomas W.; Descartes, Sylvie & Chromik, Richard R.
Partner: UNT College of Engineering
open access

Sculpted grain boundaries in soft crystals

Description: Article describes study in which "soft heteroepitaxy” is used to exert precise control over the lattice orientation of three-dimensional liquid crystalline soft crystals, thereby granting the ability to sculpt the grain boundaries between them.
Date: November 29, 2019
Creator: Li, Xaio; Martínez-González, José A.; Guzmán, Orlando; Ma, Xuedan; Park, Kangho; Zhou, Chun et al.
Partner: UNT College of Engineering
open access

Synthesis of uniform single layer tungsten disulfides for tunable photoluminescence

Description: This article explores single-layer tungsten disulfides (WS₂) because of their unique tunable bandgap. The authors report the scalable synthesis of uniform single-layer WS2 film by a two-step chemical vapor deposition (CVD) method followed by a laser thinning process.
Date: November 23, 2017
Creator: Park, Juhong; Kim, Min Su; Cha, Eunho; Kim, Jeongyong & Choi, Wonbong
Partner: UNT College of Engineering
open access

Rational design of efficient transition metal core– shell electrocatalysts for oxygen reduction and evolution reactions

Description: This article systematically calculates polyicosahedral (plh) Ag₃₂X₆ (X = 3d transition metals) core-shell structures by the density functional theory (DFT) method to predict their electrocatalytic activities for oxygen reduction and evolution reactions.
Date: November 28, 2018
Creator: Zhao, Zhenghang; D'Souza, Jason; Chen, Fuyi & Xia, Zhenhai
Partner: UNT College of Engineering
open access

Small-Scale Plastic Deformation of Nanocrystalline High Entropy Alloy

Description: This article reports the fabrication of nanocrystalline (NC) Al₀.₁CoCrFeNi high entropy alloy and subsequent small-scale plastic deformation behavior via nano-pillar compression tests.
Date: November 20, 2018
Creator: Mridha, Sanghita; Komarasamy, Mageshwari; Bhowmick, Sanjit; Mishra, Rajiv & Mukherjee, Sundeep
Partner: UNT College of Engineering
open access

Atomic Distribution in Catalytic Amorphus Metals

Description: This article investigates the atomic distribution in catalytically active metallic glass alloys using three-dimensional atom probe microscopy.
Date: November 24, 2015
Creator: Mridha, Sanghita; Jaeger, David L.; Singh Arora, Harpreet; Banerjee, Rajarshi & Mukherjee, Sundeep
Partner: UNT College of Engineering
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