Effect of yttrium on properties of copper prepared by powder metallurgy

Zhang, Xiao; Geng, Haoran; Sun, Chenyu; Jia, Peng; Luo, Hong

doi:10.1016/j.apt.2015.05.003

Cited by 14 publications

(5 citation statements)

References 20 publications

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“…Differences in the thermal expansion coefficients of Y and Cu may produce internal stress in the sintering process, leading to lattice distortion in the copper matrix. As the density of yttrium particles around the dislocation increases, the generated Y 2 O 3 matrix not only has excellent hardness, abrasion resistance and thermal stability, it also has higher enthalpy than many other reinforced materials, and under the right conditions, it can form a copper crystal orientation relationship at the interface [ 45 ]. Compared with the incoherent interface, the coherent interface between the reinforcement and matrix provides both effective strengthening and stronger pinning effect at room temperature, which prevents the growth of copper grains and maintains their initial grain size to delay grain boundary migration at high temperature, ultimately strengthening the matrix material.…”

Section: Interface Characteristicsmentioning

confidence: 99%

“…(2) Rare earth elements adsorb other alloying elements and increase the concentration gradient of alloying elements, resulting in local component undercooling and enhanced heterogeneous nucleation of liquid metal matrix. (3) The composition undercooling caused by element segregation results in the formation of segregated compounds and the formation of hetero nucleation sites [ 3 , 45 , 46 , 47 ].…”

Section: Interface Characteristicsmentioning

confidence: 99%

“…The segregation of supersaturated vacancies around Y atoms can reduce the distortion energy and vacancy formation energy, resulting in the formation of vacancy pairs or clusters around Y atoms [ 48 ]. These vacancy pairs and clusters gradually gather along the dense row plane to form a solute-rich region, which leads to the increase of nucleation number of precipitates [ 45 ]. Ma et al designed and processed a new Cu–Cr–Yb alloy [ 49 ].…”

Section: Interface Characteristicsmentioning

confidence: 99%

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Research Progress in Interfacial Characteristics and Strengthening Mechanisms of Rare Earth Metal Oxide-Reinforced Copper Matrix Composites

Jiang

2022

Materials

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The existence of a small amount of rare earth metal oxides (REMOs) can greatly affect the structure and function of copper matrix composites owing to improvement of surface and interface properties between REMOs and metal matrix, and there are still some challenges concerning interfaces and complex interfacial reactions. This review summarizes the interfacial characteristics and strengthening mechanisms of REMO-reinforced copper matrix composites, including fabrication methods for solving rare earth metal oxide-dispersion problems and characterization of the microstructure and properties of REMO-reinforced copper matrix composites. In particular, the strengthening effects of various rare earth metal oxide-reinforced copper matrix composites are systematically summarized. The interface characteristics of composites from a thermodynamics standpoint and the strengthening mechanism are emphatically investigated and discussed in order to help unveil design principles and to provide reference for future research of REMO-reinforced copper matrix composites.

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Section: Interface Characteristicsmentioning

confidence: 99%

Section: Interface Characteristicsmentioning

confidence: 99%

Section: Interface Characteristicsmentioning

confidence: 99%

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Research Progress in Interfacial Characteristics and Strengthening Mechanisms of Rare Earth Metal Oxide-Reinforced Copper Matrix Composites

Jiang

2022

Materials

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“…El proceso de la fabricación de materiales con la mezcla hierro y óxido de Itrio, se ha limitado a la relación de la etapa de acondicionamiento de los polvos por molienda, y se han revelado varios resultados de la aleación mecánica, los cambios estructurales presentados y sus propiedades mecánicas [10][11].…”

Section: Introductionunclassified

Mejoramiento de la resistencia a la corrosión de las mezclas de hierro e itrio mediante pulvimetalurgia

Chaparro

Angarita-Moncaleano

́ópez-Camargo

2021

Aibi revista investig. adm. ing.

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Se fabrica por vía Pulvimetalúrgica mezcla de 0%, 1%, 3%, 5%, 7% contenido en peso de Óxido de Itrio en Hierro Fe; con el fin de establecer la influencia del cerámico en el metal al ser expuesto en una solución con contenido de cloruro de sodio. Las probetas son sometidas a caracterización estructural obtenida mediante difracción de rayos X (DRX), mientras que el análisis de las propiedades electroquímicas se llevó a cabo mediante el estudio de las curvas de polarización y espectroscopia de impedancias electroquímica. La caracterización luego del ensayo de deterioro se realizó mediante DRX para las diferentes mezclas, los productos de corrosión se identificaron con DRX. A partir de los resultados se obtuvo la aleación mecánica y evidenciando nuevas fases (Óxido de itrio y hierro) y (Hierro de itrio) producto del proceso de la fabricación. Las muestras presentaron resistencia a la corrosión respecto al aumento del cerámico en el metal debido a la formación de las fases generadas por la mezcla, sin embargo, se determinó que el porcentaje más adecuado es el 5%, debido a que es la cantidad óptima incorporada al hierro, capaz de conferirle las propiedades de protección frente a la corrosión.

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“…Formation of intermetallic surface alloys provides unique characteristics to workpieces: improved resistance to high-temperature gas corrosion, highly effective magnetic properties [1][2][3]. There are many methods for forming intermetallic compounds (IMC) on surface of a workpiece, such as electrolysis in salt melt, plasma, and electric arc treatment.…”

Section: Introductionmentioning

confidence: 99%

Determination of Formation Regimes for Bilayer Cobalt Dysprosium Intermetalic Surface Alloy

Кovalenko

Kondratyev

Kotok

et al. 2019

EUREKA: Physics and Engineering

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High tech industrial fields on modern development stage are in need of construction materials with an optimal ratio of volume and surface properties, along with low cost of material itself. As evidenced by studies, in order to give a set complex of properties to a workpiece that operates under specific conditions, it is often sufficient to only modify its surface area. Over the course of studies, by means of gravimetric, influence of technological parameters (temperature and time samples are kept in the melt) on specific mass change of cobalt samples, that act as substrate, during electroless diffusive saturation with dysprosium in eutectic melt of lithium and Original Research Article: full paper (2019), «EUREKA: Physics and Engineering» Number 6 4 Chemical Engineering potassium chlorides have been studied. A mathematical dependency was established for specific mass change of cobalt samples on time spent in melt for temperature range of 873-973 K. Composition of intermetallic coats obtained on surface of cobalt samples was studied means of EDX and SEM analyses. It was discovered, that for chosen temperature range, diffusion layers formed on surface of cobalt samples consists of two structural zones that correspond to Co-Dy and Cp 2 Dy phases.

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Effect of yttrium on properties of copper prepared by powder metallurgy

Cited by 14 publications

References 20 publications

Research Progress in Interfacial Characteristics and Strengthening Mechanisms of Rare Earth Metal Oxide-Reinforced Copper Matrix Composites

Research Progress in Interfacial Characteristics and Strengthening Mechanisms of Rare Earth Metal Oxide-Reinforced Copper Matrix Composites

Mejoramiento de la resistencia a la corrosión de las mezclas de hierro e itrio mediante pulvimetalurgia

Determination of Formation Regimes for Bilayer Cobalt Dysprosium Intermetalic Surface Alloy

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