A Study of the Morphological Changes and the Growth Kinetics of the Oxides Formed by the High Temperature Oxidation of Cu-32.02% Zn-2.30% Pb Brass

Nyong, Aniedi E.; Udoh, Godwin; Awaka-Ama, Joachim J.; Nsi, Edet W.; Rohatgi, Pradeep K.

doi:10.1590/1980-5373-mr-2021-0173

Cited by 4 publications

(5 citation statements)

References 22 publications

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“…The two different materials of copper and zinc are grown into each other with a specific thickness in an alternative layer in the superlattice structure. The XRD pattern with As a result, the low brass structure is found to be appropriately described as a superlattice structure [67].…”

Section: Discussion Of Ordered-disordered Transitional States Of the ...mentioning

confidence: 96%

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Structural Strength Analyses for Low Brass Filler Biomaterial with Anti-Trauma Effects in Articular Cartilage Scaffold Design

Miskon

Zaidi

2022

Materials

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The existing harder biomaterial does not protect the tissue cells with blunt-force trauma effects, making it a poor choice for the articular cartilage scaffold design. Despite the traditional mechanical strengths, this study aims to discover alternative structural strengths for the scaffold supports. The metallic filler polymer reinforced method was used to fabricate the test specimen, either low brass (Cu80Zn20) or titanium dioxide filler, with composition weight percentages (wt.%) of 0, 2, 5, 15, and 30 in polyester urethane adhesive. The specimens were investigated for tensile, flexural, field emission scanning electron microscopy (FESEM), and X-ray diffraction (XRD) tests. The tensile and flexural test results increased with wt.%, but there were higher values for low brass filler specimens. The tensile strength curves were extended to discover an additional tensile strength occurring before 83% wt.%. The higher flexural stress was because of the Cu solvent and Zn solute substituting each other randomly. The FESEM micrograph showed a cubo-octahedron shaped structure that was similar to the AuCu3 structure class. The XRD pattern showed two prominent peaks of 2θ of 42.6° (110) and 49.7° (200) with d-spacings of 1.138 Å and 1.010 Å, respectively, that indicated the typical face-centred cubic superlattice structure with Cu and Zn atoms. Compared to the copper, zinc, and cart brass, the low brass indicated these superlattice structures had ordered–disordered transitional states. As a result, this additional strength was created by the superlattice structure and ordered–disordered transitional states. This innovative strength has the potential to develop into an anti-trauma biomaterial for osteoarthritic patients.

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Section: Discussion Of Ordered-disordered Transitional States Of the ...mentioning

confidence: 96%

“…The d of about 10 nm thickness indicated the typical thickness of the superlattice structure that was made up of alternative layers of two different materials[66]. As a result, the low brass structure is found to be appropriately described as a superlattice structure[67].…”

mentioning

confidence: 97%

Structural Strength Analyses for Low Brass Filler Biomaterial with Anti-Trauma Effects in Articular Cartilage Scaffold Design

Miskon

Zaidi

2022

Materials

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“…In any case, the treatment of nickel, cobalt, or copper tubes with oxygen atoms causes oxidation and the oxides are rarely in the form of a smooth film of uniform thickness. Many authors reported very rich morphology after treating metallic samples with oxygen plasma [66][67][68]. The evolution of surface morphology depends on numerous parameters, but it is clear that the morphology evolves with increasing treatment times.…”

Section: Co 3 Omentioning

confidence: 99%

The penetration depth of atomic radicals in tubes with catalytic surface properties

PAUL,

MOZETIČ,

ZAPLOTNIK

et al. 2024

Plasma Sci. Technol.

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Catalysis of molecular radicals is often performed in interesting experimental configurations. One possible configuration is tubular geometry. The radicals are introduced into the tubes on one side, and stable molecules are exhausted on the other side. The penetration depth of radicals depends on numerous parameters, so it is not always feasible to calculate it. This article presents systematic measurements of the penetration depth of oxygen atoms along tubes made from nickel, cobalt, and copper. The source of O atoms was a surfatron-type microwave plasma. The initial density of O atoms depended on the gas flow and was 0.7, 2.4, and 4.2 〖∙10〗^21 m^(-3) at the flow rates of 50, 300, and 600 sccm, and pressure of 10, 35, and 60 Pa, respectively. The gas temperature remained at room temperature throughout the experiments. The dissociation fraction decreased exponentially along the length of the tubes in all cases. The penetration depths for well-oxidized nickel were 1.2, 1.7, and 2.4 cm, respectively. For cobalt, they were slightly lower at 1.0, 1.3, and 1.6 cm, respectively, while for copper, they were 1.1, 1.3, and 1.7 cm, respectively. The results were explained by gas dynamics and heterogeneous surface association. These data are useful in any attempt to estimate the loss of molecular fragments along tubes, which serve as catalysts for the association of various radicals to stable molecules.

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“…The oxide layer formed was found to be convoluted. Such convolution is essentially due to the difference in the thermal expansivity, both in linear and volumetric terms, of the Cu-32.02% Zn-2.30% Pb alloy substrate and the oxides formed [19].…”

Section: The Surface Morphology After the Thermal Oxidationmentioning

confidence: 99%

Cu-32.02%Zn-2.30%Pb ALLOY SURFACE SUPERHYDROPHOBICITY INDUCED BY AN ARACHIDATE LAYER

Nyong,

Udoh,

Effiong

et al. 2023

Academia Materials Science

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A combination of thermal oxidation and chemical modification has been applied in creating a superhydrophobic surface on a Cu-32.02% Zn-2.30% Pb alloy. The thermal oxidation was initiated in air, and the chemical modification of the oxide surface was effected in 0.005 M solution of arachidic acid. Evaluation of the surfaces after the surface modification was done with SEM, XRD, FT-IR, and contact angle measurement tools. From the XRD studies, the presence of ZnO and PbO was confirmed on the oxidized surfaces. Equally from the XRD and FT-IR tools, it was confirmed that the arachidates of zinc and lead were the products formed after the chemical modification. These products existed in various nanostructural forms on the copper alloy surface. The average contact angles of water measured after the chemical modification step were 153.73 ± 7.35 and 144.94 ± 0.78 for the samples modified in 0.005 M arachidic acid for 6 and 12 hours, respectively.

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A Study of the Morphological Changes and the Growth Kinetics of the Oxides Formed by the High Temperature Oxidation of Cu-32.02% Zn-2.30% Pb Brass

Cited by 4 publications

References 22 publications

Structural Strength Analyses for Low Brass Filler Biomaterial with Anti-Trauma Effects in Articular Cartilage Scaffold Design

Structural Strength Analyses for Low Brass Filler Biomaterial with Anti-Trauma Effects in Articular Cartilage Scaffold Design

The penetration depth of atomic radicals in tubes with catalytic surface properties

Cu-32.02%Zn-2.30%Pb ALLOY SURFACE SUPERHYDROPHOBICITY INDUCED BY AN ARACHIDATE LAYER

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