Characterization of In-Situ Cu–TiH2–C and Cu–Ti–C Nanocomposites Produced by Mechanical Milling and Spark Plasma Sintering

Oanh, Nguyen Thi Hoang; Việt, Nguyễn Hoàng; Kim, Ji-Soon; Jorge, Alberto Moreira

doi:10.3390/met7040117

Cited by 18 publications

(7 citation statements)

References 16 publications

(20 reference statements)

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“…Therefore, it is reasonable to presume that the first shrinkage in the DIL curves is caused by the decomposition of TiH 2 , producing hydrogen and reducing the oxide in the Cu particles subsequently. This claim has been confirmed by the research conducted by Oanh et al [36] which showed that oxygen in the in-situ formed Cu-TiC composite can be reduced by the addition of a small amount of TiH 2 .…”

Section: Discussionsupporting

confidence: 60%

The Effects of Sintering Temperature and Addition of TiH2 on the Sintering Process of Cu

et al. 2019

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In this study, effects of sintering temperature and TiH2 on the sintering process of Cu are investigated. During sintering, the oxide in Cu decomposes and generates oxygen, which can become trapped in the material forming closed pores. Therefore, this results in low sintered density. Sintering behavior of Cu can be significantly improved by adding 0.5 wt.% TiH2 which decomposes during sintering, producing hydrogen and effectively reducing the oxide in Cu. Although gas products of the reduction reaction may still be trapped inside the close pores formed near the TiH2 particles and handicap the sintering of Cu, an isothermal treatment at 650 °C can avoid forming close pores. This allows reaction products to dissipate freely from the sample, subsequently increasing its sintered density.

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Section: Discussionsupporting

confidence: 60%

The Effects of Sintering Temperature and Addition of TiH2 on the Sintering Process of Cu

et al. 2019

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“…For copper matrix composites, one of the promising reinforcements is titanium carbide, TiC, which is the most thermodynamically stable compound in the Ti–C–Cu system. TiC–Cu composites have recently been obtained through different processing routes [3,4,5,6,7,8,9,10,11,12]. The synthesis of carbide-containing composite materials from different sources of carbon has attracted attention due to the possibility of controlling the size of the carbide particles and their distribution in the matrices.…”

Section: Introductionmentioning

confidence: 99%

Interaction of a Ti–Cu Alloy with Carbon: Synthesis of Composites and Model Experiments

et al. 2019

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Titanium carbide (TiC), is the most thermodynamically stable compound in the Ti–C–Cu system, which makes it a suitable reinforcement phase for copper matrix composites. In this work, the interaction of a Ti–Cu alloy with different forms of carbon was investigated to trace the structural evolution leading to the formation of in-situ TiC–Cu composite structures. The reaction mixtures were prepared from Ti25Cu75 alloy ribbons and carbon black or nanodiamonds to test the possibilities of obtaining fine particles of TiC using ball milling and Spark Plasma Sintering (SPS). It was found that the behavior of the reaction mixtures during ball milling depends on the nature of the carbon source. Model experiments were conducted to observe the outcomes of the diffusion processes at the alloy/carbon interface. It was found that titanium atoms diffuse to the alloy/graphite interface and react with carbon forming a titanium carbide layer, but carbon does not diffuse into the alloy. The diffusion experiments as well as the synthesis by ball milling and SPS indicated that the distribution of TiC particles in the composite structures obtained via reactive solid-state processing of Ti25Cu75+C follows the distribution of carbon particles in the reaction mixtures. This justifies the use of carbon sources that have fine particles to prepare the reaction mixtures as well as efficient dispersion of the carbon component in the alloy–carbon mixture when the goal is to synthesize fine particles of TiC in the copper matrix.

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“…Composite materials containing ceramic compounds can be manufactured via exsitu [1,2] or in-situ routes [3][4][5]. The ex-situ route is based on adding a previously synthesized compound to the matrix.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ceramic Reinforcements in Metallic Matrices during Spark Plasma Sintering: Consideration of Reactant/Matrix Mutual Chemistry

2021

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Metal–ceramic composites are obtained via ex-situ or in-situ routes. The in-situ route implies the synthesis of reinforcement in the presence of a matrix and is often regarded as providing more flexibility to the microstructure design of composites than the ex-situ route. Spark plasma sintering (SPS) is an advanced sintering method that allows fast consolidation of various powder materials up to full or nearly full density. In reactive SPS, the synthesis and consolidation are combined in a single processing step, which corresponds to the in-situ route. In this article, we discuss the peculiarities of synthesis of ceramic reinforcements in metallic matrices during SPS with a particular consideration of reactant/matrix mutual chemistry. The formation of carbide reinforcements in Cu, Al, and Ni matrices is given attention with examples elaborated in the authors’ own research. Factors determining the suitability of reactive SPS for manufacturing of composites from a matrix/reactants system and features of the structural evolution of the reaction mixture during sintering are discussed.

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Characterization of In-Situ Cu–TiH2–C and Cu–Ti–C Nanocomposites Produced by Mechanical Milling and Spark Plasma Sintering

Cited by 18 publications

References 16 publications

The Effects of Sintering Temperature and Addition of TiH2 on the Sintering Process of Cu

The Effects of Sintering Temperature and Addition of TiH2 on the Sintering Process of Cu

Interaction of a Ti–Cu Alloy with Carbon: Synthesis of Composites and Model Experiments

Synthesis of Ceramic Reinforcements in Metallic Matrices during Spark Plasma Sintering: Consideration of Reactant/Matrix Mutual Chemistry

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