Electrical resistivity of light metals and alloys. Its measurement, interpretation and application Part 1 Methodology and basic values.

伸也, 小松; 辰一郎, 藤川

doi:10.2464/jilm.47.170

Cited by 37 publications

(8 citation statements)

References 32 publications

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“…Therefore, the cause of the decrease in resistivity during natural aging is attributed to change in the concentration of lattice defects. Grain boundaries, dislocations and vacancies are pointed out as lattice defects in the HPT-processed present alloy specimens 16) . As shown in Table 1, the grain size, i.e.…”

Section: Discussionmentioning

confidence: 92%

“…1 and 2, the resistivities of the Cu-Be-Co and Cu-Ti specimens decreased during natural aging after HPT processing. It is well known that the resistivity of an alloy is in uenced by thermal scattering of electrons, and concentrations of solute atoms and lattice defects 16) . The inuence of thermal scattering can be neglected because resistivity measurements in this study were conducted at a constant temperature of 293 K. No change in microhardness was observed during natural aging (Figs.…”

Section: Discussionmentioning

confidence: 99%

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Effects of Natural Aging on Age-Hardening Behavior of Cu-Be-Co and Cu-Ti Alloys Severely Deformed by High-Pressure Torsion

et al. 2017

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Solution-treated Cu-1.8 mass%Be-0.2 mass%Co and Cu-3 mass%Ti alloys were subjected to severe plastic deformation using high-pressure torsion (HPT) process to examine the change in densities of grain boundary, dislocation and vacancy during natural aging of the two alloys at 293 K after HPT-straining, and the in uence of the natural aging on the age-hardening behavior of the alloys on subsequent articial aging. Application of HPT processing under an applied pressure of 5 GPa for 10 revolutions at 1 rpm to each alloy produced an ultrafine-grained structure. Aging the HPT-processed alloys at 293 K for the longest period of 2.59 Ms (1 month) did not essentially change the dislocation densities and grain sizes of the alloys; however, the vacancy concentrations of the alloys gradually decreased with increasing natural aging time. The attained peak hardness of the CuBe Co alloy on subsequent arti cial aging at 593 K decreased as natural aging time increased, while the natural aging at 293 K for 2.59 Ms had no in uence on the age-hardening behavior of the Cu-Ti alloy during arti cial aging at 623 K. This result is ascribed to the difference in formation mechanisms of strengthening precipitates between two alloys; G.P. zones are directly formed in CuBe Co alloy while β-Cu 4 Ti phase is formed via spinodal decomposition without nucleation events in Cu-Ti alloy.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Effects of Natural Aging on Age-Hardening Behavior of Cu-Be-Co and Cu-Ti Alloys Severely Deformed by High-Pressure Torsion

et al. 2017

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“…The Si and W formed a solid solution. The TCR of the solid solution was lower than that of the metal element . Consequently, the TRC of the sample was significantly decreased.

2 C + S_{i} O_{2} = S_{i} + 2 CO

Δ g = 717550 - 369.18 T J / mol

…”

Section: Discussionmentioning

confidence: 99%

Enhancement of bonding strength between lead wires and ceramic matrix of metal ceramic heater

Zhu

Liu

Yan

et al. 2019

Int J Applied Ceramic Tech

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In recent years, metal ceramic heaters (MCHs) have become widely used in daily life and industrial applications. This paper introduces a method for producing an MCH with high bonding strength of the bonding wires by adding oxide additives (Al 2 O 3 , SiO 2 , and MgO) to a metal slurry. Pilot experiments were carried out at 1600°C under a protective atmosphere. The results indicate that the temperature coefficient How to cite this article: Zhu F, Liu H, Yan B, Deng T. Enhancement of bonding strength between lead wires and ceramic matrix of metal ceramic heater. Int J Appl Ceram Technol. 2019;16:2245-2253. https ://doi.

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“…In addition, electric conductivity is known to be decreased by 0.2%IACS when the dislocation density reaches 10 11 cm ¹2 . 7,8) It is known that the dislocation density of cold-worked aluminum alloys gets at 10 10 cm ¹2 . 9) In the current study, the dislocation density of the constriction part is estimated to be under 10 10 cm ¹2 due to hot deformation.…”

Section: Discussionmentioning

confidence: 99%

Effects of Impurities and Processing Conditions in Al–1%Mn Alloys on the Formation of Thermally Stabilized Substructures

Tanaka¹,

Narita²

2018

Mater. Trans.

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In this study, the effects of impurities and processing conditions on the thermal stability of substructures formed via hot deformation were investigated using a plane strain compression (PSC) test. Two types of Al1%Mn alloys were prepared. One of the alloys had a low content of silicon and iron owing to the use of pure aluminum bare metal (4N1Mn alloy). The other was cast by using A1050 alloy (10501Mn alloy). The PSC tests were performed between 300 and 500°C and were followed by annealing at 500°C for 120 s in a salt bath. After the salt bath treatment, the 4N1Mn alloys exhibited a recrystallized structure, whereas the 10501Mn alloys retained their fiber structure. Although the 4N1Mn alloys exhibited a small increase in conductivity after the PSC test, the conductivity of the 10501Mn alloys showed an apparent increase. The synchrotron radiation analysis confirmed AlMnSi precipitations in the compressed 10501Mn alloys. These precipitations could be the reason for the change in conductivity in the compressed 10501Mn alloys. Precipitations were barely observed for the compressed 4N1Mn alloys, and small precipitations formed during hot deformation seemed to affect the formation of the thermal stabilized substructures. In addition, the study results showed that impurities, such as silicon, contribute to precipitation during hot deformation.

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Electrical resistivity of light metals and alloys. Its measurement, interpretation and application Part 1 Methodology and basic values.

Cited by 37 publications

References 32 publications

Effects of Natural Aging on Age-Hardening Behavior of Cu-Be-Co and Cu-Ti Alloys Severely Deformed by High-Pressure Torsion

Effects of Natural Aging on Age-Hardening Behavior of Cu-Be-Co and Cu-Ti Alloys Severely Deformed by High-Pressure Torsion

Enhancement of bonding strength between lead wires and ceramic matrix of metal ceramic heater

Effects of Impurities and Processing Conditions in Al–1%Mn Alloys on the Formation of Thermally Stabilized Substructures

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