Synthesis of ultra-fine Mo–Cu nanocomposites by coreduction of mechanical-activated CuMoO4–MoO3 mixtures at low temperature

Sun, Aokui; Wang, Dezhi; Wu, Zhuangzhi; Zan, Xiuqi

doi:10.1016/j.jallcom.2010.06.080

Cited by 25 publications

(4 citation statements)

References 8 publications

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“…The resulting degradation rates of the 2-naphthol were measured to be as high as 90 % in 360 min. In the current study, the synthesis of CdMoO 4 nanoparticles is reported [16][17][18][19]. This production is done by ultrasonic solution of cadmium(II) nitrate hexahydrate Cd(NO 3 ) 3 Á6H 2 O and ammonium heptamolybdate tetrahydrate (NH 4 ) 6 Mo 7 O 24 .4H 2 O.…”

Section: Introductionmentioning

confidence: 99%

A simple sonochemical approach for synthesis of cadmium molybdate nanoparticles and investigation of its photocatalyst application

Khademolhoseini

Zakeri

Rahnamaeiyan

et al. 2015

J Mater Sci: Mater Electron

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Nanoparticles cadmium molybdate was prepared by ultrasonic method using cadmium(II) nitrate hexahydrate and ammonium heptamolybdate tetrahydrate were used as precursor materials. To the best of authors' knowledge, it is the first time that cadmium molybdate was synthesized by ultrasonic method. The as synthesized nanostructures were characterized by X-ray diffraction, scanning electron microscopy, X-ray energy dispersive spectroscopy, and ultraviolet-visible spectroscopy. To evaluate the catalytic properties of nanocrystalline cadmium molybdate, the photocatalytic degradation of 2-naphthol under visible light irradiation was carried out.

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Section: Introductionmentioning

confidence: 99%

A simple sonochemical approach for synthesis of cadmium molybdate nanoparticles and investigation of its photocatalyst application

Khademolhoseini

Zakeri

Rahnamaeiyan

et al. 2015

J Mater Sci: Mater Electron

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“…Mo-Cu interfaces are widely believed to play an important role in determining the performance and longevity of various Mo-Cu products. [52] Material travels faster along grain boundaries than through crystals or bodies. [53] The same is true for W. It is observed from Table 1 that W/Mo-Cu composites generally have two forms of mechanical bonding [14,47,[54][55][56][57][58] and metallurgical bonding, [5,31,55,[59][60][61][62] and chemical bonding [6,35,[63][64][65][66] can also be formed by adding alloying elements.…”

Section: Interface Bonding and Bonding Mechanismsmentioning

confidence: 99%

Strengthening Mechanisms and Thermal Models of Chemically Incompatible Metals (Mo/W–Cu): A Review

et al. 2023

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Molybdenum (Mo) and tungsten (W) are elements of the same family with similar properties, and both of them have high hardness, mechanical strength, and electrochemical corrosion properties, [1] which are widely used in the research and application of hightemperature and arc ablation-resistant materials. [2,3] Mo-Cu and W-Cu alloys are typical pseudoalloys. [4] There is almost no reaction between tungsten and copper, molybdenum and copper in the sintering process, and almost no intermetallic compounds are produced, which is due to the great differences in crystal structure and physical properties between tungsten and copper particles, molybdenum and copper particles. [5,6] W-Cu alloys and Mo-Cu alloys are widely used in microelectronics applications, aerospace technology, and military equipment because of their excellent electrical conductivity, excellent thermal conductivity, excellent arc resistance, flame retardant of fused joints, and other attractive properties. [1,[7][8][9] The addition of Cu and other high thermal conductivity (TC) metals can make it have a thermal expansion coefficient (CTE) close to silicon and high TC. [7][8][9][10][11][12][13] When the service temperature exceeds the melting point of Cu, Cu in the material can absorb a lot of heat through the transformation of physical states such as liquefaction and evaporation, and play a role of sweating and cooling. [9] As a result, Mo/W-Cu composites (Mo-Cu and W-Cu) have excellent high-temperature resistance and better ablation resistance than pure metal Mo/W. [14][15][16][17] Mo/W-Cu composites have excellent physical and mechanical properties, but their applications are severely limited by density and interface problems. Densification and interface strengthening can improve mechanical, thermal, and electrical properties of Mo/W-Cu composites. The electrical and thermal properties of Mo/W-Cu composites are closely related to the addition of alloying elements, [6] densification of green compacts, [18,19] thermal cycle, [20] and applied pressure in the case of hot pressing. [21] At present, the study in the densification of Mo/W-Cu composites is almost about the influence of a single factor, and there is no comprehensive summary of the densification process. In the experimental process, there are also considerable difficulties in fully characterizing the microstructure, atomic structure, and chemical properties of the interface, which can be described by creating molecular dynamics models. However, there are few researches on molecular dynamics simulation of Mo/W-Cu composite.Mo/W-Cu composites are an attractive radiator material due to their combinational properties of Mo/W and Cu. [22] However, Mo/W-Cu composites materials are widely distributed in

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“…The mixing mass ratio of these two powders was calculated based on the stoichiometric ratio of each composite. The heating temperature and heating period for Cu 3 Mo 2 O 9 powder were 700°C and 1 hour, and those for CuMoO 4 powder were 500°C and 12 hours [13] respectively.…”

Section: Sample Preparation -Copper Molybdatementioning

confidence: 99%

Tribological Properties of Copper Molybdate Powder Solid Lubricants under High Temperature Conditions

et al. 2015

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In our previous research, it was suggested that a sort of copper molybdate Cu 3 Mo 2 O 9 generated on the friction track of aluminum bronze coated with MoO 3 powder reduced friction under high temperature conditions. In order to study the lubricity of copper molybdate as high temperature lubricant, the lubrication properties of two kinds of copper molybdate powders, CuMoO 4 and Cu 3 Mo 2 O 9, were studied by comparing with the lubricity of CuO and MoO 3 powders. These powders were supplied to the sliding surface of the stainless steel specimens as solid lubricant and the friction test was conducted at various ambient temperatures ranging from room temperature to 700°C. Cu 3 Mo 2 O 9 and CuMoO 4 powders were synthesized by heating the mixture of CuO and MoO 3 powders in their own specific heating conditions and identified by XRD. Both of Cu 3 Mo 2 O 9 and CuMoO 4 powders showed lower friction coefficient and smaller wear amount of specimen with increasing ambient temperature. On the other hand, CuO and MoO 3 powders showed poor lubricating ability and high wear amount of specimens comparing with two kinds of copper molybdate powders. It was suggested that the enhanced maintaining abilities of copper molybdate on the stainless steel substrate at high temperature and generation of unoxidized copper under high temperature conditions could enhance lubricating abilities.

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Synthesis of ultra-fine Mo–Cu nanocomposites by coreduction of mechanical-activated CuMoO4–MoO3 mixtures at low temperature

Cited by 25 publications

References 8 publications

A simple sonochemical approach for synthesis of cadmium molybdate nanoparticles and investigation of its photocatalyst application

A simple sonochemical approach for synthesis of cadmium molybdate nanoparticles and investigation of its photocatalyst application

Strengthening Mechanisms and Thermal Models of Chemically Incompatible Metals (Mo/W–Cu): A Review

Tribological Properties of Copper Molybdate Powder Solid Lubricants under High Temperature Conditions

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