Deformation induced Elinvar behavior in Fe-Ni Invar alloy

Qin, Feng; Lu, Fengshuang; Chen, Yulin; Yang, Jianmin; Zhao, Xinqing

doi:10.1016/j.scib.2018.07.006

Cited by 12 publications

(3 citation statements)

References 9 publications

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“…INVAR alloy is a kind of Fe-Ni alloys with about 36% Ni. It has been significantly used in OLED display preparation for extremely low thermal expansion coefficient [1][2][3][4] .…”

Section: Background and Problemsmentioning

confidence: 99%

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19‐1: Invited Paper: Development of INVAR alloy foil used in FMM

Chao,

Dongchao,

Shu

et al. 2024

Symp Digest of Tech Papers

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According to different smelting processes, nonmetallic inclusions are divided into four grades: basic purity, industrial purity, high purity and ultra‐high purity to cope with the influence of inclusion size and quantity on INVAR foil. Smelting production was carried out according to different needs in OLED field. The concept of "extreme manufacturing" was inducted to design process. The "Four‐Ultra quality" controling that Ultra‐purity, Ultra‐smooth surface, Ultra‐flat shape and Ultra‐precise dimension were put forward and realized in the production process of INVAR alloy foil for FMM. The prepared INVAR alloy foil reached a high level and met the application requirements of FMM.

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“…INVAR alloy is a kind of Fe-Ni alloys with about 36% Ni. It has been significantly used in OLED display preparation for extremely low thermal expansion coefficient [1][2][3][4] .…”

Section: Background and Problemsmentioning

confidence: 99%

“…INVAR alloy had three main applications in OLED field: (1)Frame. As the supporting structure of display device, It was made of INVAR alloy plate with 30~40mm in thickness.…”

Section: Background and Problemsmentioning

confidence: 99%

19‐1: Invited Paper: Development of INVAR alloy foil used in FMM

Chao,

Dongchao,

Shu

et al. 2024

Symp Digest of Tech Papers

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“…Moreover, for mechanical components of precision instruments, temperature-independent volumes and elastic moduli are required [6][7][8]. A combination of both properties has only been obtained in gum metals [9,10] and Fe-Ni alloys [11] after intense deformation, thereby promoting the development of materials with intrinsic near-zero expansion and temperature-invariant elastic behavior irrespective of the plastic deformation route.…”

Section: Introductionmentioning

confidence: 99%

A Proposal for a Composite with Temperature-Independent Thermophysical Properties: HfV2–HfV2O7

et al. 2020

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The HfV2–HfV2O7 composite is proposed as a material with potentially temperature-independent thermophysical properties due to the combination of anomalously increasing thermoelastic constants of HfV2 with the negative thermal expansion of HfV2O7. Based on literature data, the coexistence of both a near-zero temperature coefficient of elasticity and a coefficient of thermal expansion is suggested for a composite with a phase fraction of approximately 30 vol.% HfV2 and 70 vol.% HfV2O7. To produce HfV2–HfV2O7 composites, two synthesis pathways were investigated: (1) annealing of sputtered HfV2 films in air to form HfV2O7 oxide on the surface and (2) sputtering of HfV2O7/HfV2 bilayers. The high oxygen mobility in HfV2 is suggested to inhibit the formation of crystalline HfV2–HfV2O7 composites by annealing HfV2 in air due to oxygen-incorporation-induced amorphization of HfV2. Reducing the formation temperature of crystalline HfV2O7 from 550 °C, as obtained upon annealing, to 300 °C using reactive sputtering enables the synthesis of crystalline bilayered HfV2–HfV2O7.

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