Radiation Shielding Properties of Spark Plasma Sintered Boron Carbide-Aluminium Composites

Büyük, B.; Tuğrul, Atíye; Cengiz, Meral; Yücel, Onuralp; Göller, Gültekin; Şahin, Filiz Çınar

doi:10.12693/aphyspola.128.b-132

Cited by 24 publications

(13 citation statements)

References 7 publications

(8 reference statements)

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“…Furthermore, they are similar to the values reported for B4C Al metal matrix composites [7] at a gamma energy level of 661.7 keV. However, the linear attenuation coefficients of Al2O3.TiO2;mm and Al2O3.TiO2;nm are lower than those of Al-4% Cu/B4C metal matrix composites [6] and TiB2-reinforced B4C-SiC [10] The best HVL value of 3.57 cm obtained in this study is better than the results of [9], but significantly less than the values reported for some stainless and boron steels [8].…”

Section: Resultssupporting

confidence: 86%

“…The linear attenuation coefficients of Al2O3;mm and Al2O3;nm are similar to those of TiB2-reinforced B4C-silicon carbide composites [5] and spark plasmasintered B4C-Al [9]; however, they are higher than the values reported for h-BN and h-BN-TİB2 composites [4] and lower than those of Al-4% Cu/B4C metal matrix composites [6], B4C Al metal matrix composites [7], and some stainless and BSs steels [8] at 661.7 keV. At gamma energies of 1173.2 and 1332.5 keV, Al2O3;mm and Al2O3;nm samples have lower linear attenuation coefficients than Al-4% Cu/B4C metal matrix composites [6] and TiB2-reinforced B4C-SiC [10].…”

Section: Resultssupporting

confidence: 56%

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A Study on the Gamma-Ray Attenuation Coefficients of Al2O3 and Al2O3.TiO2 Compounds

Zaim

Bayhatun²

2018

SDÜ Fen Bil Enst Der

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Abstract:In this study, micro and nanometers-sized powders of Al2O3 and Al2O3.TiO2 were prepared using a hydraulic cold press and their gamma-radiation shielding properties were assessed at photon energies of 661.7, 1173.2 and 1332.5 keV. A sample counting process was implemented using a gamma-ray spectrometer with a 3×3 NaI (Tl) detector and 13384-channel multichannel analyser. The results we obtained indicated that the gamma-shielding properties of the materials increased with TiO2 addition and also, the particle size found to be an important effect on the properties. The results were compared with each other and also compared with the results of similar studies reported in literature. Al2O3 ve Al2O3.TiO2 Bileşiklerinin Gama Zayıflama Katsayıları Üzerine Bir ÇalışmaAnahtar kelimeler Gama ışını zayıflaması katsayıları, Al2O3, Al2O3.TiO2, NaI (Tl) detektor Özet: Bu çalışmada parçacık boyutları mikrometre ve nanometre düzeyinde olan toz halindeki Al2O3 ve Al2O3.TiO2 bileşikleri, soğuk hidrolik pres metodu kullanılarak deneye hazırlandı ve 661.7, 1173.2 ve 1332.5 keV foton enerjileri dikkate alınarak gama-radyasyonuna karşı zırhlama özellikleri incelendi. Örnekler için sayım işlemi 3×3 NaI (Tl) dedektörü ve 13384-kanalı olan çok kanallı gamaradyasyonu spektrometresi kullanılarak gerçekleştirildi. Elde edilen sonuçlardan, malzemelere TiO2 katkısının, malzemelerin gama zırhlama özelliklerini arttırmakta olduğu ve bu bulguya ilaveten malzemelerin parçacık boyutlarının da zırhlama özelliklerini etkilemekte olduğu anlaşıldı. Elde edilen sonuçlar kendi aralarında ve de literatürdeki mevcut benzer çalışmaların sonuçları ile kıyaslandı.

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Section: Resultssupporting

confidence: 86%

Section: Resultssupporting

confidence: 56%

A Study on the Gamma-Ray Attenuation Coefficients of Al2O3 and Al2O3.TiO2 Compounds

Zaim

Bayhatun²

2018

SDÜ Fen Bil Enst Der

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“…After the irradiation, all TLDs were read out on the Harshaw 2000A TLD reader. The resulting data provided a profile of relative sensitivities among TLDs in this single holder [9][10][11][12][13]. Actually before the dose assessment some study which shows the TLDS' sensitivities should be done and for this purpose the calibration factor for dosimeters and readers was obtained according to Cr-51.…”

Section: Methodsmentioning

confidence: 99%

The Chronic Dose Assessment of Three Critical Organs for Liver Scintigraphy with Using Cr-51

Maranci

Tuğrul

2017

Acta Phys. Pol. A

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In this study, a dosimetric study was observed by using Cr-51 gamma radioisotope on liver scintigraphy. In this context, the source organ is determined as liver and it is aimed the evaluation of measuring doses from source organ to selected three critical organs (thyroid, gonad, and brain). An antropomorphic torso phantom has been preferred in the experiments. The measurements of critical organs doses were examined for chronic effects. Moreover, the chronic effect of Cr-51 radioisotope on critical organs was determined as cumulative dose. Thermoluminescent dosimeters were used for chronic dose assessment. In the experiments, lithium fluoride (LiF) (TLD-100) detectors were used and they were provided from Turkish Atomic Energy Authority -Cekmece Nuclear Research and Training Center and calibrated in there. Within this study, the evaluation of the cumulative doses by using Cr-51 for three critical organs was observed with an original setup by using anthropomorphic torso phantom experimentally.

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“…Composite materials are used in a wide range of applications [6][7][8][9][10][11][12][13]. A lot of work has been done towards producing and evaluating the electrical performance of contact materials [14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Mechanical Alloying Parameters of Cu25W Electrical Contact Material

Biyik

Aydın

2017

Acta Phys. Pol. A

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In this study, the effect of mechanical alloying parameters, namely the effect of process control agent, ballto-powder weight ratio and milling duration, on the synthesis of Cu25W composite powder was investigated. Planetary-type ball milling equipment was used to conduct mechanical alloying experiments. Stearic acid was used as the process control agent in order to establish a balance between cold welding and fracturing. The optimum amount of stearic acid was determined as a function of particle size and milling time at constant speed. By using this optimum amount of process control agent, three different ball-to-powder weight ratio values were also employed, and the effect of ball-to-powder weight ratio on particle size and morphology of Cu25W composite powders was investigated. The microstructural evolution of the milled powders was characterized using scanning electron microscopy and laser diffraction analysis. The test results have shown that the morphology and particle size distribution of the milled powders change significantly depending upon the milling parameters. In addition, higher ball-to-powder weight ratio values tend to lower the milling duration for the same amount of particle size reduction. However, particle size reduction suffers beyond the maximal value of ball-to-powder weight ratio, especially in the later stages of mechanical alloying.

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Radiation Shielding Properties of Spark Plasma Sintered Boron Carbide-Aluminium Composites

Cited by 24 publications

References 7 publications

A Study on the Gamma-Ray Attenuation Coefficients of Al<sub>2</sub>O<sub>3</sub> and Al<sub>2</sub>O<sub>3</sub>.TiO<sub>2</sub> Compounds

A Study on the Gamma-Ray Attenuation Coefficients of Al<sub>2</sub>O<sub>3</sub> and Al<sub>2</sub>O<sub>3</sub>.TiO<sub>2</sub> Compounds

The Chronic Dose Assessment of Three Critical Organs for Liver Scintigraphy with Using Cr-51

Optimization of Mechanical Alloying Parameters of Cu25W Electrical Contact Material

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