Bor nitrür nanoplateletlerin ve nano Ag takviyeli yapısal yapıştırıcıların kayma dayanımı

Bu çalışmada, hava araçlarında kullanılan farklı bileşenli yapıların hibrid nanoparçacık takviyesiyle epoksi yapıştırıcıların kayma dayanımları araştırılmıştır. 8 kat 0°/90° düz dokuma karbon kumaştan el yatırma tekniği vakum yardımıyla 1,7±0,1 mm kalınlığında üretilmiştir. Üretilen karbon elyaf takviyeli epoksi kompozitler (KETEK) ile 2024-T3 Alüminyum (Al) levhalar modifiye edilmiş epoksi yapıştırıcılarla tek taraflı bindirmeli bağlantı olarak ASTM D1002-10 standartlarına göre test edilmiştir. Al 2024-T3 malzeme ASTM D3933-98 fosforik asit anotlama ve KETEK numuneler ise ASTM D2093-03 standartlarına göre yüzey hazırlama yöntemleri kullanılmıştır. Epoksi reçineye ağırlıkça %0,5 Bor Nitrür Nanoplateler (BNNPs) ile ağırlıkça farklı oranlarda (%0,5, 1,0 ve 1,5) nano gümüş (Ag) parçacıkları ilave edilmiştir. Hibrid nanoyapıştırıcılar ile referans numunelerin kayma dayanımları, elastik modülleri ve kayma şekil değişimleri karşılaştırılmıştır. Hibrid nanoyapıştırıcı sistemlerin kırılma analizi, taramalı elektron mikroskobu (SEM) kullanılarak incelenmiştir. Farklı şekil ve boyutlardaki nanomalzemelerin kırık yüzeylerde, destekledikleri farklı enerji dağıtım mekanizmaları nedeniyle belirgin özellikler sunduğunu mikroyapıları ortaya çıkarmıştır. Modifiye edilmiş epoksi yapıştırıcıların termogravimetrik analizi (TGA) ile bozunma sıcaklıkları, termal kararlılığı ve kalan kütle miktarları karakterize edilmiştir.

Anahtar Kelimeler:

Tek taraflı bindirmeli bağlantı, Kayma dayanımı, Nanoparçacık, Hibrid nanoyapıştırıcı

Shear strength of boron nitride nanoplatelets and nano Ag reinforced structural adhesives

In this study, shear strength of epoxy adhesives with hybrid nanoparticle reinforcement of various component structures used in aircraft was investigated. 8 layer 0°/90° flat woven carbon fabric hand depositing technique vacuum system is produced with a thickness of 1.7 ± 0.1 mm. Produced carbon fibers reinforced epoxy composites (KETEK) and 2024-T3 Aluminum (Al) sheets were tested in accordance with ASTM D1002-10 standards as a one-sided overlap connection with modified epoxy adhesives. Al 2024-T3 material ASTM D3933-98 phosphoric acid anodization and KETEK samples were used according to ASTM D2093-03 standards. To the epoxy resin was added 0.5 wt. % Boron Nitride Nanoplatelets (BNNPs) and nano-silver (Ag) particles in different ratios (0.5, 1.0, and 1.5%) by weight. The shear strength, elasticity modulus and slip pattern changes of the hybrid nanoparticles and reference samples were compared. Fracture analysis of hybrid nanoadhesive systems was investigated using scanning electron microscopy (SEM). The microstructures revealed that nanomaterials with different shapes and dimensions provide distinct features on the fracture surfaces due to the different energy dissipation mechanisms, which they support. The thermogravimetric analysis (TGA) of the modified epoxy adhesives was characterized by decomposition temperatures, thermal stability and residual mass quantities.

Keywords:

Single lap joints, Shear strength, Nanoparticles, Hybrid nanoadhesive,

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