Strengthening in rapidly solidified age hardened CuCr and CuCrZr alloys

Correia, José Brito; Davies, H.A.; Sellars, C. M.

doi:10.1016/s1359-6454(96)00142-5

Cited by 221 publications

(79 citation statements)

References 19 publications

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“…Furthermore, the final lattice parameter of the sample milled for 80 hours in S2 and S3 samples is in good agreement with the previous relationship between lattice parameter and alloy composition established for supersaturated solid solution samples produced by rapid solidification. 12 Full solid solubility of Cr in Cu had been confirmed by detailed microstructural study in these samples. Therefore, our results show that a Cu-7wt.…”

Section: Xrd Analysismentioning

confidence: 68%

SYNTHESIS OF NANO-CRYSTALLINE Cu-Cr ALLOY BY MECHANICAL ALLOYING

Sheibani

Heshmati-Manesh

Ataie

2012

Int. J. Mod. Phys. Conf. Ser.

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In this paper, the influence of toluene as the process control agent (PCA) and pre-milling on the extension of solid solubility of 7 wt.% Cr in Cu by mechanical alloying in a high energy ball mill was investigated. The structural evolution and microstructure were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques, respectively. The solid solution formation at different conditions was analyzed by copper lattice parameter change during the milling process. It was found that both the presence of PCA and pre-milling of Cr powder lead to faster dissolution of Cr. The mean crystallite size was also calculated and showed to be about 10 nm after 80 hours of milling.

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Section: Xrd Analysismentioning

confidence: 68%

SYNTHESIS OF NANO-CRYSTALLINE Cu-Cr ALLOY BY MECHANICAL ALLOYING

Sheibani

Heshmati-Manesh

Ataie

2012

Int. J. Mod. Phys. Conf. Ser.

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“…The true lattice parameter of the specimen was determined by a least square regression of the values calculated from each reflection against cosθcotθ, taking lattice parameter as the intercept of the regression line [15], and the instrumental broadening was eliminated by using the XRD pattern of strain free pure Si powders. The morphologies of the milled powders were characterized by scanning electron microscopy .The particle size of powders was obtained by measuring the dimensions of at least 100 particles in several micrographs for each sample.…”

Section: Methodsmentioning

confidence: 99%

An investigation on morphology and structure of Cu-Cr-Al2O3 powders prepared by mechanical milling

Shen

Zhu²,

et al. 2017

Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 20

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Abastract：In this study, the effect of the milling time on microstructure of Cu-0.5 wt.% Cr-1 wt.% Al 2 O 3 was investigated. The lattice parameter was evaluated by the X-ray diffraction technique. The microstructure was characterized by scanning electron microscopy. Also, size and distribution of Cr and Al 2 O 3 were investigated by using X-rays energy dispersive (EDX) mapping. The result shows that the lattice parameter of the Cu phase increases with increasing milling time. The changing trend of Cu particle sizes as the alloying time increases, the particle sizes first increase and then decrease. When milling 1.5h, the powders coarsen than as-received Cu powder. Then the particle sizes of the samples decreased when the milling time increased to 3h and above. In addition, the size and distribution of Cr and Al 2 O 3 decreased and dispersed much fine with increasing milling time.

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“…Pure elemental Cu was used as matrix (99.95% purity with particle size in the 44-149 μm range). Cr doping was carried out by incorporating in the mill charge the suitable proportion of a water atomized Cu-2.6 wt% Cr alloy powder [12].…”

Section: Methodsmentioning

confidence: 99%

Production of Cu/diamond composites for first-wall heat sinks

Nunes

Correia

Carvalho³

et al. 2011

Fusion Engineering and Design

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Due to their suitable thermal conductivity and strength copper-based materials have been considered appropriate heat sinks for first wall panels in nuclear fusion devices. However, increased thermal conductivity and mechanical strength are demanded and the concept of property tailoring involved in the design of metal matrix composites advocates for the potential of nanodiamond dispersions in copper. Copper-nanodiamond composite materials can be produced by mechanical alloying followed by a consolidation operation. Yet, this powder metallurgy route poses several challenges: nanodiamond presents intrinsically difficult bonding with copper; contamination by milling media must be closely monitored; and full densification and microstructural homogeneity should be obtained with consolidation. The present line of work is aimed at an optimization of the processing conditions of Cu-nanodiamond composites. The challenges mentioned above have been addressed, respectively, by incorporating chromium in the matrix to form a stable carbide interlayer binding the two components; by assessing the contamination originating from the milling operation through particle-induced X-ray emission spectroscopy; and by comparing the densification obtained by spark plasma sintering with hot-extrusion data from previous studies.

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Strengthening in rapidly solidified age hardened CuCr and CuCrZr alloys

Cited by 221 publications

References 19 publications

SYNTHESIS OF NANO-CRYSTALLINE Cu-Cr ALLOY BY MECHANICAL ALLOYING

SYNTHESIS OF NANO-CRYSTALLINE Cu-Cr ALLOY BY MECHANICAL ALLOYING

An investigation on morphology and structure of Cu-Cr-Al2O3 powders prepared by mechanical milling

Production of Cu/diamond composites for first-wall heat sinks

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