Advances on the hot wire technique

Santos, Wilson Nunes dos

doi:10.1016/j.jeurceramsoc.2007.04.012

Cited by 30 publications

(19 citation statements)

References 14 publications

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“…Transient measurement techniques are appropriate for low-conductivity porous materials. Recently, the transient heat exchange methods have been preferred for the determination of the thermal properties of materials [16]. TPS (Transient Plane Source) is a modern technique that gives information about the thermal conductivity, thermal diffusivity and specific heat per unit volume of the material under study.…”

Section: Test Methodsmentioning

confidence: 99%

Mechanical and thermophysical properties of lightweight aggregate concretes

Oktay

Yumrutaş

Abdullah

2015

Construction and Building Materials

131

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Section: Test Methodsmentioning

confidence: 99%

Mechanical and thermophysical properties of lightweight aggregate concretes

Oktay

Yumrutaş

Abdullah

2015

Construction and Building Materials

131

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“…The parallel hot-wire technique was chosen based on the following line of reasoning (Santos, 2008): (i) it requires prismatic specimens with representative dimensions (i.e., considerably large dimensions); (ii) it enables one to measure thermal conductivities at room temperature (which is impossible via calorimetric methods); and (iii) the temperature gradient across the sample can be quite low (thermal conductivity should be ideally measured over a zero temperature gradient across the sample).…”

Section: Methodsmentioning

confidence: 99%

Thermal performance of sisal fiber-cement roofing tiles for rural constructions

Tonoli¹,

Santos

Rabi

et al. 2011

Sci. agric. (Piracicaba, Braz.)

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Roofing provides the main protection against direct solar radiation in animal housing. Appropriate thermal properties of roofing materials tend to improve the thermal comfort in the inner ambient. Nonasbestos fiber-cement roofing components reinforced with cellulose pulp from sisal (Agave sisalana) were produced by slurry and dewatering techniques, with an optional addition of polypropylene fibers. Nonasbestos tiles were evaluated and compared with commercially available asbestos-cement sheets and ceramic tiles (frequently chosen as roofing materials for animal housing). Thermal conductivity and thermal diffusivity of tiles were determined by the parallel hot-wire method, along with the evaluation of the downside surface temperature. Cement-based components reinforced with sisal pulp presented better thermal performance at room temperature (25 o C), while those reinforced with sisal pulp added by polypropylene fibers presented better thermal performance at 60°C. Non-asbestos cement tiles provided more efficient protection against radiation than asbestos corrugated sheets.

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“…However, the wear of the tip and uncertainty of contact geometries limits the accuracy of the traditional SThM. Moreover, Based on hot-wire technique, SThM can not measure electrically conductive materials due to the conductivity of its sensorWollaston wire [10].…”

Section: Hot-tip Technique For Localized Thermal Measurementmentioning

confidence: 99%

A multi-function tribological probe microscope with a hot tip for thermal measurement

Yue

Liu

Cai

et al. 2008

Fifth International Symposium on Instrumentation Science and Technology

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Surface mechanical and thermal properties objectively affect our touch-feel perception. However, it is still far from known that how the surface properties affect the stimulus to our nerve system and make us feel warm or cold, hard or soft, rough or smooth, etc. Physically, although the surface properties can be measured individually by different instruments, it is desirable to have a multifunctional instrument to facilitate the investigation of the relationship between the surface physical characteristics and the corresponding perceived touch feeling by human. In our previous work, a novel multi-functional tribological probe microscope (TPM) was developed to provide mappings of four functions of a surface at micro and nanometer scales. The four functions of surface topography, hardness, Young's modulus and friction are measured in a single scan set-up and they are potentially linked in space and time to provide cross-correlation in between. In this paper, to achieve the additional function of micro thermal analysis, we proposed a new scheme of thermal probe with a hot wire (Wollaston wire) buried beneath a Berkovich diamond indenter. The details of mechanical design and associated electronic circuits are presented. Meanwhile, the paper also explains the principle of the hot-tip technique by relating its signals to established physical parameters of materials, a method that separates sample information from the artifact caused by the indentation geometry of the diamond tip. Experimental results of thermal conductivity measurements on certain metal specimens are discussed.

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Advances on the hot wire technique

Cited by 30 publications

References 14 publications

Mechanical and thermophysical properties of lightweight aggregate concretes

Mechanical and thermophysical properties of lightweight aggregate concretes

Thermal performance of sisal fiber-cement roofing tiles for rural constructions

A multi-function tribological probe microscope with a hot tip for thermal measurement

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