Journal of Boron最新文献_第2页

Investigation of the Effect of Manufacturing Parameters on the Density of AlCu-B4C Composites Prepared by Powder Metallurgy Method 研究制造参数对粉末冶金法制备的 AlCu-B4C 复合材料密度的影响

Journal of Boron Pub Date : 2023-07-17 DOI: 10.30728/boron.1263860

Mehmet Eker, Demet Zalaoğlu

{"title":"Investigation of the Effect of Manufacturing Parameters on the Density of AlCu-B4C Composites Prepared by Powder Metallurgy Method","authors":"Mehmet Eker, Demet Zalaoğlu","doi":"10.30728/boron.1263860","DOIUrl":"https://doi.org/10.30728/boron.1263860","url":null,"abstract":"Bu çalışmada, toz metalurjisi yöntemi ile hazırlanan, farklı oranlarda (hacimce % 0, 10 ve 20) B4C parçacık takviyeli Al-%10Cu ana yapılı kompozit malzemenin sinterleme sonrası yoğunluğuna, takviye oranı, sıkıştırma basıncı ve sinterleme sıcaklığının etkisi incelenmiştir. Kompozit üretimi için yüksek saflıkta alaşım ve seramik tozları kullanılmış, elde edilen homojen karışım soğuk preste sıkıştırılmış ve tüp fırında sinterlenmiştir. Tayin edilen değişkenlerin sinterleme sonrası yoğunluğa etkisi Taguchi deney tasarımı yöntemi kullanılarak incelenmiştir. Bu amaç ile sürece en uygun Taguchi tasarımı olan, L9 ortogonal deney tasarımı seçilmiş ve deneyler bu matrise göre gerçekleştirilmiştir. Bu tasarım ile yapılan analizler sonucunda elde edilen S/N oranı yanıtlarına göre, sıkıştırma basıncının en yüksek etkiye, takviye oranının da görece düşük etkiye sahip olduğu gözlemlenmiştir. Taguchi deney tasarımı ve yapılan regresyon analizi sonucunda, oluşturulan regresyon modelinin ise %95 güven aralığın içinde olduğu sonucu elde edilmiştir.","PeriodicalId":431027,"journal":{"name":"Journal of Boron","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139358630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of Neutron Attenuation Properties of Boron Carbide-Silicon Carbide Composite Materials by MCNP6 Simulation 通过 MCNP6 仿真研究碳化硼-碳化硅复合材料的中子衰减特性

Journal of Boron Pub Date : 2023-07-16 DOI: 10.30728/boron.1267320

B. Büyük, M. Yaşar, Nuri Yorulmaz, M. Kamislioglu

{"title":"Investigation of Neutron Attenuation Properties of Boron Carbide-Silicon Carbide Composite Materials by MCNP6 Simulation","authors":"B. Büyük, M. Yaşar, Nuri Yorulmaz, M. Kamislioglu","doi":"10.30728/boron.1267320","DOIUrl":"https://doi.org/10.30728/boron.1267320","url":null,"abstract":"Nükleer teknoloji, nanoteknoloji ve uzay teknolojisi gibi kritik alanlarda kullanılan bor karbür-silisyum karbür kompozit malzemelerinin makroskobik nötron tesir kesitleri, MCNP6 programı kullanılarak hesaplanmıştır. Nötronların madde ile etkileşimi, özellikle nötron enerjisine ve koruyucu malzemenin yoğunluğuna bağlıdır. Bu çalışmada, farklı oranlarda B4C ve SiC bileşenleri kullanılarak oluşturulan 100_B4C, 8200, 7300 ve 6400 kodlu 4 farklı B4C-SiC içerikli kompozit kullanılmıştır. İTÜ TRIGA Mark-II nükleer reaktöründe Nötron Howitzer (Pu-Be) sayım sistemi kullanılarak elde edilen deneysel nötron sonuçları Monte Carlo simülasyonları ile karşılaştırılmıştır. Bu karşılaştırma, kompozit malzemelerin nötron zayıflatma özelliklerini deneysel ve teorik sonuçların birlikte değerlendirilmesini sağlamıştır. En yüksek nötron radyasyon zayıflatma özelliğine sahip olan kompozitlerin sırasıyla 100_B4C>8200>7300>6400 şeklinde olduğu görülmüştür. Ayrıca, nötronların toplam makroskobik tesir kesitleri Σ_tot (cm-1), elementlerin kütlesel ayırma tesir kesiti değerleri (Σ_tot/ρ) (cm2g-1), teorik olarak da hesaplanmış ve aradaki fark belirlenmiştir.","PeriodicalId":431027,"journal":{"name":"Journal of Boron","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139358894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Betacoronavirus ve S. aureus'un hekzagonal bor nitrür ile etkileşimi

Journal of Boron Pub Date : 2023-05-07 DOI: 10.30728/boron.1261594

Gizem Aytoğu, Yapıncak Goncu, Belma NURAL YAMAN, Berfin Kadi̇roğlu, Özer Ateş, M. Üreyen, Nuran Ay, Kadir Yeşi̇lbağ

{"title":"Betacoronavirus ve S. aureus'un hekzagonal bor nitrür ile etkileşimi","authors":"Gizem Aytoğu, Yapıncak Goncu, Belma NURAL YAMAN, Berfin Kadi̇roğlu, Özer Ateş, M. Üreyen, Nuran Ay, Kadir Yeşi̇lbağ","doi":"10.30728/boron.1261594","DOIUrl":"https://doi.org/10.30728/boron.1261594","url":null,"abstract":"Investigations on advance effects of boron-containing compounds have gained attention the last decade. This study was carried out to investigate the effect of hexagonal boron nitride nanoparticles (BNNPs) on Bovine Coronavirus (BCoV) and Staphylococcus aureus (S. aureus) by different methods. First, biological effects of different BNNPs concentrations lower than 0.5 mg/mL examined on HRT-18 (Human Rectal Tumor) for 5 days. Different concentrations of hBN mixed with BCoV in liquid, on membrane or directly on cells and examined for differences of titers or replications. And also Bacterial Filtration Efficiency (BFE) test of hBN powders coated on polypropylene fabric by spray method was applied against S. aureus. The compound was found slightly toxic on the HRT-18 cell line by live cell counting, while no remarkable morphological difference was observed. BNNPs treatment with 0.025 or 0.3mg/mL concentrations did not reduce the infective titer and create no inhibitory effect on in vitro replication. Stability of virus titer after treatment of BNNPs coated fabric also indicated no antiviral efficiency. But hBN applied fabric formed a barrier of ≥90.3%, while non hBN applied fabric formed ≥64.6% barrier. The present study demonstrate that, BNNPs alone is not a good candidate for disinfectant or drug for BCoVs, while it could be valuable to use as coated fabric in the areas needing easy sanitation especially for S. aureus.","PeriodicalId":431027,"journal":{"name":"Journal of Boron","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117150069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of hexagonal boron nitride production with luminescent properties 六方氮化硼的发光性能研究

Journal of Boron Pub Date : 2023-04-30 DOI: 10.30728/boron.1266900

Janserin Özkurt, N. Ay

引用次数: 0

Bor Nitrür ile kaplı 18650 Tip Li iyon Pillerinin Isıl ve Elektrokimyasal Özelliklerinin İyileştirilmesi 改善氮化硼涂层 18650 型锂离子电池的热性能和电化学性能

Journal of Boron Pub Date : 2023-04-30 DOI: 10.30728/boron.1249060

Semih Engün, Burak Tarhan, Benan Elmusa, Servet Turan, Nuran Ay, Hikmet Karakoç

{"title":"Bor Nitrür ile kaplı 18650 Tip Li iyon Pillerinin Isıl ve Elektrokimyasal Özelliklerinin İyileştirilmesi","authors":"Semih Engün, Burak Tarhan, Benan Elmusa, Servet Turan, Nuran Ay, Hikmet Karakoç","doi":"10.30728/boron.1249060","DOIUrl":"https://doi.org/10.30728/boron.1249060","url":null,"abstract":"Lithium-ion batteries have a significant safety concern since they are prone to thermal runaway as the battery technology advances to high energy density and fast charge requirements. To address this issue, new material solutions are emerging that provide better heat dissipation. Boron nitride is a promising candidate as a heat conductor material in thermal management systems because of its high thermal conductivity. Therefore, this material allows effective heat dissipation and reduces the risk of thermal runaway issues. To this end, hexagonal boron nitride (hBN) was coated onto the outer cases of 18650-type batteries to dissipate the heat produced inside the battery. A cyclic charge-discharge test was performed on the hBN-coated battery sample at 10C to compare the results with a reference sample with only a polymer insulator. The findings revealed that the hBN coating on the insulator-free battery case offered efficient heat dissipation, improved capacity retention, and less change in internal resistance. Thus, the hBN coating has the potential as a solution for the efficient thermal management of Li-ion battery cases.","PeriodicalId":431027,"journal":{"name":"Journal of Boron","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134294728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aktif karbon destekli ucuz ve kullanışlı katalizörün amonyak bor hidrolizinde incelenmesi

Journal of Boron Pub Date : 2023-04-25 DOI: 10.30728/boron.1179156

Hatice Bektaş, Erhan Onat, Ömer Şahi̇n, Sevilay Demi̇rci̇, Orhan Baytar, M. S. İzgi̇

引用次数: 0

Al/Al-B4C Dairesel Hibrit Kompozitlerin Mekanik Özelliklerinin İncelenmesi

Journal of Boron Pub Date : 2023-04-20 DOI: 10.30728/boron.1116270

Abdullah Göçer, Fehmi Nai̇r

{"title":"Al/Al-B4C Dairesel Hibrit Kompozitlerin Mekanik Özelliklerinin İncelenmesi","authors":"Abdullah Göçer, Fehmi Nai̇r","doi":"10.30728/boron.1116270","DOIUrl":"https://doi.org/10.30728/boron.1116270","url":null,"abstract":"Hybrid composites are material types obtained by combining two different composite structures. In this study, the mechanical properties of the circular hybrid composite materials which was produced in the form of rod with aluminum sheath and metal matrix composite core (Al-Ceramic mixture) were investigated under compression and bending loads. Although some mechanical properties of metal matrix composites (MMC) are improved with ceramic reinforcement, some of their properties as deformation ability is reduced. It was aimed to increase them by forming aluminum sheath on the outside of these materials. Al7075 aluminum alloy was used as sheath material while Al2124 alloy and B4C were used as core material. Extrusion process was used to produce the composite rods. The extrusion billets were produced with PIT (powder in tube) method. In this method, Al2124-B4C powder mixture was compressed in Al7075 tubes. Al2124-B4C powder mixture was prepared volumetrically at three different ratios (% 5, % 10 and % 15). The extrusion operation was realized at constant temperature (500 °C) and constant extrusion rate (R=14) and the composite rods produced in 8 mm diameter. The composite bars produced with and without sheaths were subjected to compression and three-point bending tests. According to the test results, with increasing of the B4C ratio in MMC bars, the deformation rate decreased rapidly. In the composites produced as hybrid, it was seen that the deformation ability increased and this showed that the aluminum sheath provided the desired improvement.","PeriodicalId":431027,"journal":{"name":"Journal of Boron","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130425307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of tribological properties of hexagonal boron nitride reinforced AZ91 magnesium composites produced by powder metallurgy 粉末冶金法制备六方氮化硼增强AZ91镁复合材料摩擦学性能研究

Journal of Boron Pub Date : 2023-04-19 DOI: 10.30728/boron.1267756

Cevher Kursat Macit, Turan Gürgenç, Muhammet Gökhan Albayrak, C. Özel

{"title":"Investigation of tribological properties of hexagonal boron nitride reinforced AZ91 magnesium composites produced by powder metallurgy","authors":"Cevher Kursat Macit, Turan Gürgenç, Muhammet Gökhan Albayrak, C. Özel","doi":"10.30728/boron.1267756","DOIUrl":"https://doi.org/10.30728/boron.1267756","url":null,"abstract":"Bu çalışmada, AZ91 magnezyum alaşımı ve AZ91 alaşımına ağırlıkça %10 hBN (hegzagonal bor nitrür) nanoparçacıkları takviye edilerek homojen kompozit malzeme karışımları yapıldı. Hazırlanan tozların soğuk presleme yöntemiyle 400 MPa basınç ile preslenmesi ve 590 C° sıcaklıkta argon atmosferinde sinterlemeleri gerçekleştirildi. Hazırlanan numunelerin mikroyapıları taramalı elektron mikroskobu (SEM) ve enerji dağılımlı X-ışınları (EDX) analizleri ile incelenmiştir. Numunelerin 20 saniye yükleme süresinde 5 farklı noktadan sertlik değerleri alındı ve bu sertlik değerlerinin ortalaması alınarak ortalama sertlik değerleri belirlendi. Aşınma testleri pin-on-disk deney cihazında farklı yük değerlerinde (5 N, 10 N ve 15 N) toplam 300 metre kayma mesafesinde, 50 mm/sn kayma hızında ve kuru şartlarda yapıldı. Sürtünme katsayısı değerleri ile aşınma sonucundaki ağırlık kayıpları incelendi. Yapılan deneyler sonucunda hBN katkısının AZ91 alaşımı üzerinde sertlik değerinde çok daha yüksek değerleri getirdiği görülmüştür. Yine aynı şekilde yapılan aşınma deneylerinde de hBN katkısı aşınmaya dirençli bir kompozit elde edilmesini sağlamıştır.","PeriodicalId":431027,"journal":{"name":"Journal of Boron","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128215554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Topikal Uygulamalar için Antimikrobiyal Kitosan-Sodyum tetrafloroborat (NaBF4) Hidrojeller

Journal of Boron Pub Date : 2023-04-18 DOI: 10.30728/boron.1231447

Zeynep İyi̇gündoğdu

{"title":"Topikal Uygulamalar için Antimikrobiyal Kitosan-Sodyum tetrafloroborat (NaBF4) Hidrojeller","authors":"Zeynep İyi̇gündoğdu","doi":"10.30728/boron.1231447","DOIUrl":"https://doi.org/10.30728/boron.1231447","url":null,"abstract":"Infection of a wound is one of the most important reasons delaying the recovery of an injured tissue. In this study, chitosan-based hydrogels were loaded with different concentrations of sodium tetrafluoroborate (NaBF4) to fabricate an antimicrobial wound care system. Antimicrobial activity, and cytotoxicity of NaBF4, and surface morphology, chemical bond structures and antimicrobial activity of Chitosan:NaBF4 hydrogels against a broad spectrum of microorganisms including an antibiotic resistant species were investigated. NaBF4 showed higher antibacterial activity for gram-positive bacteria than gram-negative bacteria. MIC values of NaBF4 were 3.906, 1.953, and 7.813 µg/µL for every gram-negative, gram-positive, and fungal species, respectively. Direct cytotoxicity of NaBF4 on the L929 cell line was investigated by the MTT assay. IC50 value after 24 h incubation was calculated as 3.2 µg/µL which is within the range of concentration with antimicrobial activity. The antimicrobial activities of chitosan hydrogels were investigated by disc diffusion method. Antimicrobial activity of hydrogel increased with increasing NaBF4 concentration while parent high molecular weight chitosan-based hydrogel did not show antimicrobial activity. According to the results, sample 1:3 (NaBF4 concertation is 546.5mM in the hydrogel) was enough to achieve broad spectrum antimicrobial activity and hydrogels prepared with this formulation can be used as a potential antimicrobial wound care product.","PeriodicalId":431027,"journal":{"name":"Journal of Boron","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129114175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Investigation of boron element and its use in nuclear reactors 硼元素的研究及其在核反应堆中的应用

Journal of Boron Pub Date : 2023-03-07 DOI: 10.30728/boron.1131336

S. Uzun

引用次数: 1