Properties of porous materials of copper and nichrome fibers

Kartashova, L. I.; Salo, Vitaly I.

doi:10.1007/bf00702554

Cited by 3 publications

(2 citation statements)

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“…The micro-pore structure of metallic fiber felt provides strong capillary force and helps to form more activated nucleation sites. In the 1970s and 1990s, metallic fiber felt was employed as wick of heat pipe (Kartashova and Salo 1992;Chatys and Orzechowski 2004;Li, Peterson, and Wang 2006). However, research interest was focused more on hydrodynamics of the wick rather than heat transfer performance of boiling.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations of Pool Boiling Heat Transfer on Horizontal Plate Sintered with Metallic Fiber Felt

Huang

et al. 2012

International Journal of Green Energy

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In this study, pool boiling heat transfer performance of de-ionized water on horizontal plates sintered with copper fiber of various geometries was experimentally investigated under atmospheric pressure. Copper fiber felt with different structural parameters was proposed to provide artificial nucleate sites to improve heat transfer performance. A high-speed camera was used to photograph bubble growth processes. Pool boiling curves were obtained. Effects of fiber felt porosity and fiber diameter on the onset of nucleate boiling (ONB) and boiling heat transfer coefficient were investigated. It was revealed that copper fiber felt surfaces can reduce wall superheat at boiling incipience and exhibit significant enhancement of heat transfer compared with smooth surface. The influence of porosity on heat transfer performance for metal fiber felts was more sensitive than fiber diameter. A bubble with an average diameter of less than 0.3 mm was defined as a small-sized bubble (SSB) from visualization photograph by high-speed camera, and pool boiling heat transfer performance was highly dependent on the percentage of small-sized bubbles (PSSB) to help illustrate enhancement mechanisms between bubble size distribution and boiling heat transfer performance. Smaller mean pore diameter can be achieved through decreasing either porosity or fiber diameter, as it allowed the fiber felt to create stronger capillary force to form bigger size bubble and lower PSSB to result in improved heat transfer coefficient.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigations of Pool Boiling Heat Transfer on Horizontal Plate Sintered with Metallic Fiber Felt

Huang

et al. 2012

International Journal of Green Energy

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“…Alternatively, solid state techniques can be used, as shown by Solonin et al, 2 Bram et al 3 and Kartashova and Salo. 4 For an example, Solonin et al 2 mixed fine powders of electrolytic nickel and Calcium hydride chromium, with 20, 30, and 40 mass% urea. The mixture was formed into strips which were first annealed in an argon atmosphere to drive off the pore forming agent and then sintered in a hydrogen atmosphere for 2 h at 1100 to 1200uC.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Ni–Cr alloy foams by electrodeposition technique

Duan¹,

Li²,

Ding³

et al. 2008

Materials Science and Technology

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Metallic foams have many applications in industry and are made using various methods. However, no suitable method for heating Ni-Cr alloy foam has been available. A method of preparing Ni-Cr alloy foam by an electrodeposition technique is described in the present paper. The method includes the following steps: establishing electrical conductivity of organic foam; electroplating of a Ni layer; electroplating of a Cr layer; eliminating the organic matrix and a homogenisation heat treatment. The plating solutions and process parameters of electrodeposition are introduced in detail. Homogenisation of the samples was carried out in a sealed quartz tube at 1100uC and the homogenisation time was determined by experiment and calculation. Experimental results are shown indicating that the Ni-Cr alloy foam made by this electrodeposition technique had a three-dimensional reticulated structure and formed a single phase Ni based solid solution. Also, the apparent resistivity was measured and it is demonstrated that the higher resistivity of the foam gave it good electrical heating properties.

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Mechanical properties of oxidation-resistant Ni–Cr foams

Choe

Dunand

2004

Materials Science and Engineering: A

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Properties of porous materials of copper and nichrome fibers

Cited by 3 publications

References 0 publications

Experimental Investigations of Pool Boiling Heat Transfer on Horizontal Plate Sintered with Metallic Fiber Felt

Experimental Investigations of Pool Boiling Heat Transfer on Horizontal Plate Sintered with Metallic Fiber Felt

Preparation of Ni–Cr alloy foams by electrodeposition technique

Mechanical properties of oxidation-resistant Ni–Cr foams

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