Elif TEKİN, Serden UYUM, Buğra KARAHAN, Kadir Cihan TEKİN, UĞUR MALAYOĞLU

Soğuk Püskürtme Teknolojisi ve Uygulamaları

Soğuk püskürtme, katı tozların yakınsak/ıraksak türde bir nozul vasıtasıyla altlığa doğru hızlandırıldığı bir katı hal biriktirme işlemidir. Kaplama birikimi püskürtülen parçacıkları ergitmeden gerçekleşir. Püskürtülen parçacıklar yüksek kinetik enerjiye sahip olduğu için çarpma esnasında altlığa yapışır. Başarılı bir yapışma sağlamak için toz parçacıkların, kendi malzeme özelliklerine bağlı olan kritik hız değerini çarpma esnasında aşması gereklidir. Metaller, seramikler, kompozitler ve polimerler gibi farklı malzemeler soğuk püskürtme kullanılarak biriktirilebilir. Soğuk püskürtme, yüzey kaplaması elde etmek için yeni ve gelecek vaat eden bir teknolojidir ve biriktirme için termal enerji yerine kinetik enerji kullandığından termal püskürtmeye göre çeşitli teknolojik avantajlar sunar. Sonuç olarak, kalıntı gerilmeler, oksidasyon ve istenmeyen kimyasal reaksiyonlar önlenebilir. Soğuk püskürtme teknolojisi endüstride birçok uygulama alanına sahiptir. Birçok endüstride kullanılan bileşenlerin korunması ve onarımı amacıyla geliştirilmiştir. Son yıllarda soğuk püskürtme işlemi elektronik sistemlerin tamiri, eklemeli imalat, kaynak, sert lehimleme, yüzey koruma, tıbbi cihazlar ve tıbbi malzemeler gibi uygulama alanlarında kullanılmaktadır. Bu çalışma, soğuk püskürtme işleminin tarihsel gelişimini, temel ilkelerini ve özelliklerini, yapışma mekanizmasını ve endüstriyel uygulama alanlarını kısaca gözden geçirerek soğuk püskürtme işlemini özetlemektedir.

Anahtar Kelimeler:

Soğuk püskürtme, kaplama, kritik hız

Cold Spray Technology and its Applications

Cold spray (CS) is a solid-state deposition process in which solid powders are accelerated towards the substrate via a converging/diverging nozzle. Coating deposition occurs without melting the sprayed particles. Spray particles adhere to the substrate on impact because of their high kinetic energy. For successful bonding, powder particles have to exceed a critical velocity on impact, which is dependent on the properties of the particular spray material. Different materials such as metals, ceramics, composites and polymers can be deposited using CS. CS is a novel and promising technology to obtain surface coating, offering several technological advantages over thermal spray since it utilizes kinetic energy rather than thermal energy for deposition. As a result, residual stresses, oxidation and undesired chemical reactions can be avoided. Cold spray technology has many applications in the industry. It has been developed for the protection and repair of components used in many industries. In recent years, cold spray process has been used in application fields such as repair of electronic systems, additive manufacturing, welding, brazing, surface protection, medical devices, and medical materials. This study summarizes the cold spray process by briefly reviewing the historical development, basic principles and features, adhesion mechanism and application areas of the cold spray process.

Keywords:

Cold spray, coating, critical velocity,

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