The aim of this study is to investigate the microstructure and wear properties nickel (Ni) matrix boron carbide (B4C) carbon nanofiber (CNF)-reinforced composite materials. Microstructure phase composition composites manufactured by powder metallurgy (PM) method were determined SEM-EDS XRD analysis. While hardness values Vickers measurement method, their using pin-on-disc method. SEM images sho...

Bu çalışmada Al 6061 alaşımı içerisine farklı oranlarda borkarbür (B4C) ve grafen nanoplaka (GNP) takviye edilen hibrit kompozit malzemenin tornada işleme deneyleri yapılarak kullanılan kesici takımların aşınma davranışları incelenmiştir. B4C GNP katkısının takım aşınması üzerindeki etkisinin belirlenmesi amaçlanmıştır. Deneysel çalışmanın ilk aşamasında vortex yöntemiyle oranlarında malzemeler...

We have synthesized bulk Mg(B1−xCx)2 from a mixture of elemental Mg, B, and the binary compound B4C. Carbon incorporation was dramatically improved by a two step reaction process at an elevated temperature of 1200 C. This reaction process results in a solubility limit near x∼0.07. We found that impurities in the starting B cause an additive suppression of Tc. We combine these data with Tc and H...

The influence of nanoscale reinforcement on the mechanical behavior of ultrafine-grained composites was studied. Al 5083 (Al– 4.5 Mg–0.57Mn–0.25Fe) composites, with grain size of 115 nm and B4C reinforcement size of 38 nm, were fabricated via cryomilling and consolidation. The result reveals that the presence of nanoparticles enhances strength by interacting with dislocations, while simultaneou...

Phase pure HfB2–SiC powders were efficiently synthesized via microwave/molten salt assisted boro/carbothermal reduction (MMS-BCTR) method by using HfO2, SiO2, activated carbon and B4C as raw materials, NaCl–KCl a molten medium. The effects of mass ratio to reactant (ms/mr), holding period, reaction temperature content on the phase composition microstructure investigated. results showed that opt...

Düşük yoğunluk, yüksek sertlik, iyi aşınma direnci ve özgül mukavemet özelliklerine sahip olan Metal matris kompozitler ileri mühendislik malzemelerinin önemli bir türüdür bu özelliklerinden dolayı özellikle otomotiv, savunma, havacılık sektörlerinde tercih edilmektedirler. Alüminyum metal düşük ucuzluk kolay üretim gibi özellikleri ile matrisli kompozitlerin sınıfını oluşturmaktadır. sertlik m...

in this study, ultrafine grained 2024 al alloy based b4c particles reinforced composite was produced by mechanical milling and hot extrusion. mechanical milling was used to synthesize the nanostructured al2024 in attrition mill under argon atmosphere up to 50h. a similar process was used to produce al2024-5%wt. b4c composite powder. to produce trimodal composites, milled powders were combined w...