Preparation and thermal properties of zirconium tungstate/copper composites

Yan, Xuehua; Cheng, Xiao Nong; Xu, Gaohong; Wang, C.; Sun, Shuai; Riedel, Ralf

doi:10.1002/mawe.200800322

Cited by 18 publications

(9 citation statements)

References 27 publications

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“…Most of the metal composite work focused on Cu composites [49,50,186,187,188,189,190]. Cu is used as a heat sink in microelectronics, and copper composites that match the expansion coefficient of Si (4 × 10 −6 K −1 ) or Al 2 O 3 (7 × 10 −6 K −1 ) could find widespread applications [49].…”

Section: Compositesmentioning

confidence: 99%

“…It was found that the copper matrix exerts a pressure of ~0.45 GPa on the filler particles [ 187 , 189 ], which is high enough to induce the cubic to orthorhombic phase transition. Attempts to reduce the local stress through precoating of particles with Cu did not succeed in suppressing the transformation [ 190 ]. It should be possible to overcome this problem by using HfW 2 O 8 as a filler instead of ZrW 2 O 8 , however, no such attempts have been reported to date.…”

Section: Compositesmentioning

confidence: 99%

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Two Decades of Negative Thermal Expansion Research: Where Do We Stand?

2012

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Negative thermal expansion (NTE) materials have become a rapidly growing area of research over the past two decades. The initial discovery of materials displaying NTE over a large temperature range, combined with elucidation of the mechanism behind this unusual property, was followed by predictions that these materials will find use in various applications through controlled thermal expansion composites. While some patents have been filed and devices built, a number of obstacles have prevented the widespread implementation of NTE materials to date. This paper reviews NTE materials that contract due to transverse atomic vibrations, their potential for use in controlled thermal expansion composites, and known problems that could interfere with such applications.

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Section: Compositesmentioning

confidence: 99%

Section: Compositesmentioning

confidence: 99%

Two Decades of Negative Thermal Expansion Research: Where Do We Stand?

2012

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“…Because of the advantage of invariable length with temperature, the ZTE (Zr,Nb)Fe 2 materials can be used in the temperature-sensitive instruments. To reduce the coefficient of thermal expansion, metal matrix composites (MMCs) are often fabricated, such as Al/Y 2 Mo 3 O 12 , Al/Cu 2 V 2 O 7 , Cu/PbTiO 3 , and Cu/ZrW 2 O 8 . , It is known that inorganic NTE compounds show relatively poor mechanical properties. The present NTE (Zr,Nb)Fe 2 materials will be beneficial to obtain low thermal expansion composite materials with good comprehensive mechanical and physical properties.…”

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confidence: 99%

Transforming Thermal Expansion from Positive to Negative: The Case of Cubic Magnetic Compounds of (Zr,Nb)Fe₂

Song

Sun

Yokoyama

et al. 2020

J. Phys. Chem. Lett.

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Negative thermal expansion (NTE) is an intriguing property for not only fundamental studies but also technological applications. However, few NTE materials are available compared with the huge amount of positive thermal expansion materials. The discovery of new NTE materials remains challenging. Here we report a chemical modification strategy to transform thermal expansion from positive to negative in cubic magnetic compounds of (Zr,Nb)Fe2 by tuning the magnetic exchange interaction. Furthermore, an isotropic zero thermal expansion can be established in Zr0.8Nb0.2Fe2 (αl = 1.4 × 10–6 K–1, 3–470 K) over a broad temperature range that is even wider than that of the prototype Invar alloy of Fe0.64Ni0.36. The NTE of (Zr,Nb)Fe2 is originated from the weakened magnetic exchange interaction and the increased d electrons of Fe by the Nb chemical substitution, so that the magnetovolume effect overwhelms the contribution of anharmonic lattice vibration.

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“…In recent years, the composites with controllable thermal expansion have been fabricated by mixing ZrW 2 O 8 with some PTE materials, such as Al [12], Cu [13], SnO 2 [14], ZrO 2 [15], Zr 2 WP 2 O 12 [16], cement [17] and polyimide [18]. Aluminum has an easy process ability, low density, excellent thermal and electrical conductivity, but the large PTE (22.2 × 10 −6 K −1 ) restricts its application in the field of microelectronics and precision instruments.…”

Section: Introductionmentioning

confidence: 99%

Thermal expansion, electrical conductivity and hardness of Mn₃Zn_0.5Sn_0.5N/Al composites

Miao

Liu

Xiao

et al. 2016

Science and Engineering of Composite Materials

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Mn3Zn0.5Sn0.5N/Al composites were successfully prepared by sintering at 623 K and 723 K. It is found that the thermal expansion of Al is effectively decreased with the addition of negative thermal expansion material Mn3Zn0.5Sn0.5N, which plays the role of the thermal expansion compensator in the composite system. The thermal expansion of composites can be tailored by adjusting the volume fraction of Mn3Zn0.5Sn0.5N. In particular, 40 vol.%-Mn3Zn0.5Sn0.5N/Al composite sintered at 723 K has a low thermal expansion coefficient of 2.38×10−6K−1. The thermal expansion of Mn3Zn0.5Sn0.5N/Al composites matches well with those calculated from the rule of mixture (ROM) estimation. The ROM model can be used to predict the thermal expansion of Mn3Zn0.5Sn0.5N/Al composite and design Mn3Zn0.5Sn0.5N/Al composite with a particular thermal expansion. Mn3Zn0.5Sn0.5N/Al composites exhibit excellent electrical conductivities at the level of 104S/cm. The hardness of the as-prepared composites increases by adding Mn3Zn0.5Sn0.5N in Al.

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Preparation and thermal properties of zirconium tungstate/copper composites

Cited by 18 publications

References 27 publications

Two Decades of Negative Thermal Expansion Research: Where Do We Stand?

Two Decades of Negative Thermal Expansion Research: Where Do We Stand?

Transforming Thermal Expansion from Positive to Negative: The Case of Cubic Magnetic Compounds of (Zr,Nb)Fe₂

Thermal expansion, electrical conductivity and hardness of Mn₃Zn_0.5Sn_0.5N/Al composites

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Preparation and thermal properties of zirconium tungstate/copper composites

Cited by 18 publications

References 27 publications

Two Decades of Negative Thermal Expansion Research: Where Do We Stand?

Two Decades of Negative Thermal Expansion Research: Where Do We Stand?

Transforming Thermal Expansion from Positive to Negative: The Case of Cubic Magnetic Compounds of (Zr,Nb)Fe2

Thermal expansion, electrical conductivity and hardness of Mn3Zn0.5Sn0.5N/Al composites

Contact Info

Product

Resources

About

Transforming Thermal Expansion from Positive to Negative: The Case of Cubic Magnetic Compounds of (Zr,Nb)Fe₂

Thermal expansion, electrical conductivity and hardness of Mn₃Zn_0.5Sn_0.5N/Al composites