Porous Cu/Al composites for cost-effective thermal management

Akgül, Bekir; Erden, Fuat; Özbay, Salih

doi:10.1016/j.powtec.2021.06.007

Cited by 21 publications

(5 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Statistical optimization tools are widely used nowadays in various fields to converge scientific studies to industrial applications. [62][63][64][65] Considering that polystyrene is an industrialized polymer, economic considerations are important for manufacturers as mentioned before. Therefore, a multi objective optimization procedure, which is particularly focusing on to determine the minimum cost to reach a PS with any desirable molecular weight would be beneficial.…”

Section: Discussionmentioning

confidence: 99%

Cost-Effective Control of Molecular Weight in Ultrasound-Assisted Emulsion Polymerization of Styrene

Korkut

Erden²,

Özbay³

2022

ACSi

View full text Add to dashboard Cite

This paper focuses on the determination of economically most feasible conditions to obtain polystyrene with various target molecular weights through ultrasound-assisted emulsion polymerization. Briefly, batch polymerizations of styrene have been performed by ultrasound-assisted emulsion polymerization process using different reaction feed compositions. Polymerization rates were calculated using the monomer conversions at various reaction times. Also, molecular weights of the synthesized polymers, as well as the Mark-Houwink constants, were determined by intrinsic viscosity and gel permeation chromatography measurements. It was found that the polydispersity index of the polymers is ranging from 1.2 to 1.5, and the viscosity average molecular weights are in between 100000–1500000 g/mol depending on the reaction conditions. Finally, model equations were also developed for response variables, and the most economical ways of reaching various target molecular weights were interpreted by response surface methodology based multi objective optimization.

show abstract

Section: Discussionmentioning

confidence: 99%

Cost-Effective Control of Molecular Weight in Ultrasound-Assisted Emulsion Polymerization of Styrene

Korkut

Erden²,

Özbay³

2022

ACSi

View full text Add to dashboard Cite

show abstract

“…From that point onward, it was cooled to room temperature and left in the research center for 24 hours, and weighed to have the example mass with water (Ws) and submerged in water (Wi). Water assimilation is normally demonstrated as a level of the connection between water ingested to weight of the dry The clear thickness in (g/cm 3 ) of examples is the remainder of its dry mass separated by the outside volume, including pores. According to American specifications ASTM (C373), the Apparent Porosity (A.P), (A.P)% = Ws -WdWs − Wi × 100…”

Section: Apparent Porositymentioning

confidence: 99%

“…For specimens having 20 wt% CaCO3, tuning the sintering temperature(600°C)and compacting pressure(500 MPa)of precursors tailored superior porosity percent(47%), remarkable compressive stress(501 MPa)and high thermal(43.8 W m−1.k), and electrical conductivity(0.06 × 10 8 Ω −1 m −1 ) owing to a desirable foaming process [2]. [3] in 2021 Porous forms of Cu, Al and Cu/Al were prepared by powder metallurgy and the effect of process parameters on the micro-hardness, porosity and the cooling rate was tested. We report that despite of columnar powders are pressed more tightly under high compaction pressure, they also led to form a connected pore network if a definite percentage porosity is keep in the structure.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Influence of Adding Natural Materials to Copper and Zinc Compounds

Hassan

2022

MSF

View full text Add to dashboard Cite

This article produced porous materials by using a simple and easy method which is a powder metallurgy. This search studying an experimental fulfillment on the thermal conductivity, apparent porosity, and Diametrical Strength of porous copper-zinc manufactured by the convert to carbon since firing process and combined with the oxygen cause to CO2 gas that rises up to air and leaves the number of pores. the basic metals are Cu and Zn pure powder metals with a different ratio (10-20-30)% of natural leaves especially palm leaves which is widely found in our natures, Cu fine powder (220 µm) has purity 99.5% as a matrix material to prepared composite material with ratio 80% of material total weight, 500g, Zn fine powder added as 20% from material total weight, the Zn metallic powder has purity 99.5%. The Zn powders have size particle less than200 m. Grounded palm leaves were cut to small parts then milled by using electrical mortar to get a fine powder which have a green size (less than 0.75 m) which result by sieving instruments. The results show various values in each test. In physical testing the apparent porosity from pure \Cu-Zn has 0.11%,10%0.187%,20% 0.22,30%0.32%,where the higher value for samples of palm leaves which has presence in a higher value in 30% of palm leaves, the others tests in thermal conductivity and diametric strength, in thermal conductivity have(5 W/m.k for pure material, in 10% 0.65 W/m.k, in20% 0.38 W/m.k,in 30% 0.2 W/m.k)for Cu-Zn-P.L composites these investigations show a decreasing ingredients especially in 30%, which have the lower value with the same effect in Diametrical Strength in pure samples has 25Mpa,in 10% has 10 Mpa, in 20%6Mpa,in30% 2.5Mpa.Generally the Optimum properties of Cu-Zn-P.L additives are attained with least porosity content. The existences of porosity decline the Diametrical Strength, thermal conductivity. Thus the aim of this study was to create porous composites metal MMC with has high attractive as an insulating material, and porous composites with natural additives.

show abstract

“…Atomic number, cubic structure, theoretical density and electrical conductivity of copper at room temperature are 29, face-centered cubic (FCC), 8.94 gr cm −3 , 100%IACS, respectively [1][2][3][4]. Copper, due to its high electrical and thermal conductivity, good formability property, and relatively lower cost than other materials which have high conductivity, can be used in electrical, marine, aerospace industries [5][6][7][8]. In contrast with these promising properties, the application area of copper is limited because of its low oxidation resistance.…”

Section: Introductionmentioning

confidence: 99%

Novel advanced copper-silver materials produced from recycled dendritic copper powders using electroless coating and hot pressing

et al. 2022

View full text Add to dashboard Cite

In this study, copper powders with dendritic morphology were produced by the electrolysis method, and then silver coating was applied to these powders by an electroless coating method. The bulk samples were fabricated by hot pressing method using different ratios of copper and silver-plated copper powders. The results showed that the electroless silver coating layer provided a strong bond at the particle boundaries of the samples, significantly improving the physical and mechanical properties of the materials. Accordingly, the hardness, tensile strength, electrical and thermal conductivity values of the samples produced from silver-plated dendritic copper particles were determined to be approximately 98 HB, 185 MPa, 102 IACS% and 402 W mK −1 , respectively. In addition, the oxidation resistance of the sample produced from completely silver-coated copper powders is 4 times higher than that of pure copper.

show abstract

Porous Cu/Al composites for cost-effective thermal management

Cited by 21 publications

References 49 publications

Cost-Effective Control of Molecular Weight in Ultrasound-Assisted Emulsion Polymerization of Styrene

Cost-Effective Control of Molecular Weight in Ultrasound-Assisted Emulsion Polymerization of Styrene

Evaluating the Influence of Adding Natural Materials to Copper and Zinc Compounds

Novel advanced copper-silver materials produced from recycled dendritic copper powders using electroless coating and hot pressing

Contact Info

Product

Resources

About