The electromechanical behavior of nichrome (80/20 wt.%) film

Kazi, Imam H.; Wild, Peter; Moore, T. N.; Sayer, M.

doi:10.1016/s0040-6090(03)00390-0

Cited by 74 publications

(43 citation statements)

References 5 publications

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“…To our knowledge, the finding of point (b) was never reported before for thermal-sprayed electrical conductors, but only for thin films (Ref [25][26][27] and bulk materials ( Ref 28). The effect has been interpreted as being connected to various physical phenomena.…”

Section: Nickelmentioning

confidence: 51%

Electrical Properties of Thermally Sprayed Ni- and Ni20Cr-Based Resistors

Prudenziati

Gualtieri

2008

J Therm Spray Tech

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Five laboratories were asked to deposit Ni and Ni20Cr powders to obtain resistors; we studied their electrical properties in the temperature range 20-500°C and interpreted the results in the light of their microstructure. Resistors sprayed from Ni powders consist of NiO x ''islands'' embedded in a Ni matrix. The temperature dependence of resistance (TCR) is in perfect agreement with that of pure Ni, indicating that the matrix determines the electrical transport. Annealing at temperatures from 200 to 400°C results in an irreversible decrease of resistance. A multiphase microstructure is observed in resistors prepared from 80Ni20Cr powders. The major phase in these resistors is a NiCr alloy but with a Ni:Cr ratio larger than 80:20. Minor amounts of metal oxides are also detected. The TCR in these samples spans from 180 ppm/°C to 2830 ppm/°C, and is attributed to different degree of oxidation and segregation of the metals in the alloy.

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Section: Nickelmentioning

confidence: 51%

Electrical Properties of Thermally Sprayed Ni- and Ni20Cr-Based Resistors

Prudenziati

Gualtieri

2008

J Therm Spray Tech

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“…Film composition infl uences electric properties, and Alonso et al has studied the electrical properties of fi lm with different composition and then makes a conclusion that the 50%Ni-50%Cr has optimum properties as piezoresistive films [2] . Commonly, NiCr film with composition of 80%Ni-20%Cr is used as piezoresistive fi lms [1] . 3.2 Surface grain size AFM measurements are commonly performed to characterize the lateral grain size and top morphology at film surface.…”

Section: Film Thickness and Compositionmentioning

confidence: 99%

“…For fi lm surface, R max is explained as maximum height of peak to valley for the depicted surface. The root mean square roughness can be expressed as formula (1) where, N is the number of AFM pixels, h 0 is equal to the average height of the depicted surface and h i represents the actual height of pixel i. As seen from Fig.3, when thickness changes from 25 nm to 120 nm, the island structure was observed and the R max and increase fi rst and then decrease.…”

Section: Film Thickness and Compositionmentioning

confidence: 99%

“…In this article, Ni and Cr targets were selected for preparing NiCr alloy films by magnetron sputtering method, which enabled high deposition rate and good adhesive force between substrate and fi lm. The relation between technique parameters and electrical properties was focused on [1][2][3][4] , but the surface properties of NiCr alloy film was not referred. In order to obtain the information about surface properties of NiCr alloy fi lm, fi lms with different thickness were prepared.…”

Section: Introductionmentioning

confidence: 99%

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Surface and electrical properties of NiCr thin films prepared by DC magnetron sputtering

Zhou

Tian

Yan

2008

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Several batches of NiCr alloy thin fi lms with different thickness were prepared in a multitargets magnetron sputtering apparatus by changing sputtering time while keeping sputtering target power of Ni and Cr fi xed. Then the as-deposited fi lms were characterized by energy-dispersive X-Ray spectrometer (EDX), Atomic Force Microscope (AFM) and four-point probe (FPP) to measure surface grain size, roughness and sheet resistance. The fi lm thickness was measured by Alpha-Step IQ Profi lers. The thickness dependence of surface roughness, lateral grain size and resistivity was also studied. The experimental results show that the grain size increases with fi lm thickness and the surface roughness reaches the order of nanometer at all fi lm thickness. The as-deposited fi lm resistivity decreases with fi lm thickness.

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“…7, а, б, мають місце в плівкових стопах (рис. 8) [32][33][34] та напівпровіднико-вих плівках [35]. Результати, аналогічні [32,34], одержані також і нами на прикладі плівкових стопів Ni-Co [36].…”

Section: експериментальні результатиunclassified

Effect of the Tensosensitivity in Metal Film Materials

et al. 2007

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В огляді здійснено аналізу відомих літературних даних про явище тензое-фекту в тонких і товстих плівках металів, стопів або композиційних мате-ріялів з металевою основою. Розглянуто відомі напівклясичні та феноме-нологічні моделі для одно-і багатошарових плівкових систем, наведено ре-зультати їх апробації і вказано ступінь відповідности розрахункових і екс-периментальних результатів. Зроблено висновок про значну роль так нази-ваних деформаційних ефектів, врахування яких дає хороше узгодження з експериментальними даними. Проаналізовано найменш вивчене питання фізики тонких плівок про температурну залежність коефіцієнтів поздовж-ньої та поперечної тензочутливости. Наведено численні експериментальні результати, які підтверджують теоретичні висновки. Проаналізовано ріж-ні аспекти практичного застосування плівкових матеріялів як чутливих елементів тензодавачів.The analysis of literature results concerning tensoresistive effect in thin and thick films of metals, alloys or composite materials based on a metal is presented. Well-known semi-classical and phenomenological models for one-and multilayered film systems are considered, results of their testing are presented, and the degree of conformity of calculated results with experimental ones is specified. A conclusion is drawn concerning significant role of deformation effects, which are taken into account to give satisfactory conformity with experimental data. A least studied problem in physics of thin films concerning the temperature dependence of coefficients of longitudinal and transverse tensosensitivity is analysed. Numerous experimental results, which confirm theoretical conclusions, are presented. Different aspects of practical application of film materials as sensitive elements of strain sensors are analysed.В обзоре проведен анализ известных литературных данных по тензоэффек-ту в тонких и толстых пленках металлов, сплавов или композиционных материалов с металлической основой. Рассмотрены известные полукласси-ческие и феноменологические модели для одно-и многослойных пленоч-ных систем, приведены результаты их апробации и указана степень соот-

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The electromechanical behavior of nichrome (80/20 wt.%) film

Cited by 74 publications

References 5 publications

Electrical Properties of Thermally Sprayed Ni- and Ni20Cr-Based Resistors

Electrical Properties of Thermally Sprayed Ni- and Ni20Cr-Based Resistors

Surface and electrical properties of NiCr thin films prepared by DC magnetron sputtering

Effect of the Tensosensitivity in Metal Film Materials

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