mSLA Yöntemi ile Toz Katkılı Fotopolimer Reçine Kullanılarak Üretilen Parçaların Mekanik Özelliklerinin İncelenmesi

Abstract

Stereolitografi 3D baskı işleminde bir nesnenin her katmanı, sıvı bir fotopolimer reçinenin UV ışığa maruz bırakılmasıyla oluşturulur. UV ışığının yoğunlaştığı bölgede reçineyi katılaştıran bir kimyasal reaksiyon gerçekleşir. Son zamanlarda, reçinelerin çeşitli katkı malzemeler (metal, seramik tozlar vb.) eklenerek güçlendirilmesi ile ilgili bir eğilim olmuştur. Bu çalışmada, ağırlıkça %0.5, %1 ve %1.5 dolgu oranlarında boyutları 13-20 nm Al₂O₃, 10-25 nm TiO₂ olan nanopartiküller ve 45 µm boyutunda prina, fındık kabuğu ve kenevir tozlarının katkı maddesi olarak eklendiği reçineler kullanılarak üretilen parçaların mekanik özellikleri değerlendirilmiştir. Çalışmada malzemelerin sertlik değerleri, çekme ve eğme dayanımları incelenmiştir. Sonuçlar, toz katkılı numunelerin tamamında çekme mukavemetinin referans numunelere (katkısız) göre azaldığını göstermiştir. Buna karşılık; nanopartiküller, kenevir ve prina toz katkısı bulunan bütün numunelerde eğme kuvvetinin referans numuneden yüksek olduğu, fındık tozu katkılı bütün numunelerde ise eğme kuvvetinin referans numuneden düşük olduğu görülmüştür.

Keywords

• Eklemeli imalat
• maskeli stereolitografi (mSLA)
• toz katkılı reçine
• nanopartikül
• organik toz
• mekanik özellikler

Investigation of Mechanical Properties of Parts Produced Using Powder Additive Photopolymer Resin with Masked Stereolithography

Abstract

In the stereolithography (SLA) 3D printing process, each layer of an object is formed by exposing a liquid photopolymer resin to ultraviolet (UV) light. A chemical reaction occurs in the exposed areas, solidifying the resin. Recently, there has been a growing trend toward reinforcing resins by incorporating various additives, such as metal and ceramic powders. In this study, the mechanical properties of parts produced using resins containing additives namely, nanoparticles of Al₂O₃ (13-20 nm) and TiO₂ (10-25 nm), as well as biomass powders (45 µm) derived from olive pomace, hazelnut shells, and hemp at filler ratios of 0.5 wt.%, 1 wt.%, and 1.5 wt.% were evaluated. The study examined the hardness, tensile strength, and flexural strength of the materials. The results showed that the tensile strength decreased in all powder-reinforced specimens compared to the reference (unfilled) samples. However, it was observed that specimens containing nanoparticles, hemp, and olive pomace exhibited higher flexural strength than the reference samples, whereas all specimens with hazelnut shell powder exhibited lower flexural strength.

Keywords

• Additive manufacturing
• masked stereolithography (mSLA)
• powder-reinforced resin
• nanoparticles
• organic powders
• mechanical properties.

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