The formation of ZnO structures using thermal oxidation: How a previous chemical etching favors either needle-like or cross-linked structures

Rojas-Chávez, H.; Cruz-Martínez, H.; Montejo‐Alvaro, F.; Farías, Rurik; Hernández-Rodríguez, Y.M.; Guillén-Cervantes, A.; Ávila-García, A.; Cayetano-Castro, N.; Medina, Dora I.; Cigarroa-Mayorga, O.E.

doi:10.1016/j.mssp.2019.104888

Cited by 20 publications

(10 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Incre the final deformation reduces the critical nucleation dislocation density, eliminatin of the long needle-like δ phases. Therefore, coordinating the deformation temperatur the δ phase morphology is the key to obtaining a uniform and fine deformation microstructure [52,53]. In addition, from Figure 17a, it can also be found that the decreasing trend of δ phase content gradually slows down as the final strain increases.…”

Section: Interaction Mechanisms Between δ Phase and Drx Nucleationmentioning

confidence: 95%

“…Increasing the final deformation reduces the critical nucleation dislocation density, eliminating par of the long needle-like δ phases. Therefore, coordinating the deformation temperature and the δ phase morphology is the key to obtaining a uniform and fine deformation grain microstructure [52,53]. When the mixed-grain microstructure undergoes the final deformation, the DRX nucleation behavior is dominated by the KAM value and average grain size.…”

Section: Interaction Mechanisms Between δ Phase and Drx Nucleationmentioning

confidence: 99%

“…Increasing the final deformation reduces the critical nucleation dislocation density, eliminating part of the long needle-like δ phases. Therefore, coordinating the deformation temperature and the δ phase morphology is the key to obtaining a uniform and fine deformation grain microstructure [52,53].…”

Section: Interaction Mechanisms Between δ Phase and Drx Nucleationmentioning

confidence: 99%

See 2 more Smart Citations

Investigation on Mechanism of Microstructure Evolution during Multi-Process Hot Forming of GH4169 Superalloy Forging

Chen,

Cai,

Lin

et al. 2024

Materials

View full text Add to dashboard Cite

Typically, in the manufacturing of GH4169 superalloy forgings, the multi-process hot forming that consists of pre-deformation, heat treatment and final deformation is required. This study focuses on the microstructural evolution throughout hot working processes. Considering that δ phase can promote nucleation and limit the growth of grains, a process route was designed, including pre-deformation, aging treatment (AT) to precipitate sufficient δ phases, high temperature holding (HTH) to uniformly heat the forging, and final deformation. The results show that the uneven strain distribution after pre-deformation has a significant impact on the subsequent refinement of the grain microstructure due to the complex coupling relationship between the evolution of the δ phase and recrystallization behavior. After the final deformation, the fine-grain microstructure with short rod-like δ phases as boundaries is easy to form in the region with a large strain of the pre-forging. However, necklace-like mixed grain microstructure is formed in the region with a small strain of the pre-forging. In addition, when the microstructure before final deformation consists of mixed grains, dynamic recrystallization (DRX) nucleation behavior preferentially depends on kernel average misorientation (KAM) values. A large KAM can promote the formation of DRX nuclei. When the KAM values are close, a smaller average grain size of mixed-grain microstructure is more conductive to promote the DRX nucleation. Finally, the interaction mechanisms between δ phase and DRX nucleation are revealed.

show abstract

Section: Interaction Mechanisms Between δ Phase and Drx Nucleationmentioning

confidence: 95%

Section: Interaction Mechanisms Between δ Phase and Drx Nucleationmentioning

confidence: 99%

Section: Interaction Mechanisms Between δ Phase and Drx Nucleationmentioning

confidence: 99%

See 1 more Smart Citation

Investigation on Mechanism of Microstructure Evolution during Multi-Process Hot Forming of GH4169 Superalloy Forging

Chen,

Cai,

Lin

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…However, ZnO highly tends to crystallize in the wurtzite-type structure. Concerning its morphology, ZnO has been obtained as nanostructures, which include nanoneedles, nanosticks, nanocouples, nanoflakes, nanosprings, nanotubes, nanorods, and nanowires [ 31 , 34 , 35 ], as well as porous and dense films [ 36 ]; as gas sensing performance is mainly dependent on the morphology of the material. Significant achievements have been attained in the fabrication of gas sensors based on ZnO structures, including biosensors [ 16 , 30 , 36 , 37 , 38 , 39 , 40 , 41 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in ZnO-Based Carbon Monoxide Sensors: Role of Doping

Pineda-Reyes

Herrera-Rivera

Rojas-Chávez

et al. 2021

Sensors

View full text Add to dashboard Cite

Monitoring and detecting carbon monoxide (CO) are critical because this gas is toxic and harmful to the ecosystem. In this respect, designing high-performance gas sensors for CO detection is necessary. Zinc oxide-based materials are promising for use as CO sensors, owing to their good sensing response, electrical performance, cost-effectiveness, long-term stability, low power consumption, ease of manufacturing, chemical stability, and non-toxicity. Nevertheless, further progress in gas sensing requires improving the selectivity and sensitivity, and lowering the operating temperature. Recently, different strategies have been implemented to improve the sensitivity and selectivity of ZnO to CO, highlighting the doping of ZnO. Many studies concluded that doped ZnO demonstrates better sensing properties than those of undoped ZnO in detecting CO. Therefore, in this review, we analyze and discuss, in detail, the recent advances in doped ZnO for CO sensing applications. First, experimental studies on ZnO doped with transition metals, boron group elements, and alkaline earth metals as CO sensors are comprehensively reviewed. We then focused on analyzing theoretical and combined experimental–theoretical studies. Finally, we present the conclusions and some perspectives for future investigations in the context of advancements in CO sensing using doped ZnO, which include room-temperature gas sensing.

show abstract

“…However, the high cost and low abundance hinder their further applications . Since we know that the etching process can offer substantial advantages over other techniques, in terms of simplicity, it can effectively control the product structure and surface topography, and temperature is an important influence on it . Herein, we present a series of Zn-based and Cd-based carbon materials for CO production from CO 2 RR, via thermal etching methods.…”

Section: Introductionmentioning

confidence: 99%

A Way for Derived Carbon Materials by Thermal Etching Hybrid Borate for Electrochemical CO₂ Reduction

et al. 2020

View full text Add to dashboard Cite

Two hybridized skeleton borates [Zn(en)2]·[B7O12(OH)] (1; en = ethylenediamine) and [Cd(1,3-dap)2]·[B5O8(OH)]·H2O (2; 1,3-dap = 1,3-diaminopropane) were solvothermally synthesized. The boron oxide clusters formed 2D planes, and these planes formed a 3D structure through co-oxygen links of metal complexes. Herein, a novel strategy has been developed, i.e., the derived guest carbon materials from semi-decomposed borate are incorporated into the void of host borate crystals in situ during the thermal etching process. Moreover, the effect of temperature on fluorescence of derived carbon materials was studied. By controlling the calcining temperature, carbon dots with obvious free radicals can be found via ESR technique. Carbon dots in the ethanol phase exhibited variable photoluminescence. Furthermore, it derived semi-decomposition carbon materials via thermal etching based on compounds 1 and 2. In an hydrogen cell reactor, carbon material Zn-based catalyst 1-200 catalyzes CO2 reduction to CO with a selectivity that reaches 50.8% at −1.4 V vs RHE.

show abstract

The formation of ZnO structures using thermal oxidation: How a previous chemical etching favors either needle-like or cross-linked structures

Cited by 20 publications

References 48 publications

Investigation on Mechanism of Microstructure Evolution during Multi-Process Hot Forming of GH4169 Superalloy Forging

Investigation on Mechanism of Microstructure Evolution during Multi-Process Hot Forming of GH4169 Superalloy Forging

Recent Advances in ZnO-Based Carbon Monoxide Sensors: Role of Doping

A Way for Derived Carbon Materials by Thermal Etching Hybrid Borate for Electrochemical CO₂ Reduction

Contact Info

Product

Resources

About

The formation of ZnO structures using thermal oxidation: How a previous chemical etching favors either needle-like or cross-linked structures

Cited by 20 publications

References 48 publications

Investigation on Mechanism of Microstructure Evolution during Multi-Process Hot Forming of GH4169 Superalloy Forging

Investigation on Mechanism of Microstructure Evolution during Multi-Process Hot Forming of GH4169 Superalloy Forging

Recent Advances in ZnO-Based Carbon Monoxide Sensors: Role of Doping

A Way for Derived Carbon Materials by Thermal Etching Hybrid Borate for Electrochemical CO2 Reduction

Contact Info

Product

Resources

About

A Way for Derived Carbon Materials by Thermal Etching Hybrid Borate for Electrochemical CO₂ Reduction