Semra KURAMA, Haldun KURAMA

Nitrür Esaslı Malzemelerin Yüksek Enerjili Öğütme ile Düşük Maliyetli Üretimi

Seramik malzemelerin üretiminde, hem performans artışı hem de ekonomi en önemli iki parametredir. Bu iki işlemin yönetimindeki ortak parametre, hammaddelerin başlangıçtaki toz boyutunun kontrol edilmesidir. Nitrür bazlı ileri teknoloji malzemeleri, saflıkları ve üretim sürecindeki mikron boyutları nedeniyle önemli avantajlar sağlar. Bununla birlikte, bu malzemelerin sinterlenmesi hem zor hem de pahalıdır. Sinterleme işleminde kullanılan katkı maddeleri, nihai üründe malzemenin kullanım özelliklerinde bozulmaya neden olabilir. Özellikleri, sertliği ve aşındırıcılığı nedeniyle, öğütme işlemini kullanarak partikül boyutlarını istenen boyuta düşürmek kolay bir şekilde mümkün değildir. Bununla birlikte, tozların süspansiyonda askıda tutulması ile bu işlemi aktif, kısa ve verimli hale getirmek mümkündür. Bu nedenle, sistemdeki toz-toz, toz-bilya etkileşimini arttırmak mümkündür. Bu çalışmada, süreç farklı stabilizatörler ve ortam kullanılarak kontrol edilmiştir. Böylece, tane büyüklüğü 500 m olan nitrür tozlarının boyutu 100nm'ye düşürülmüş, bu da sinterleme ve mekanik davranışların iyileştirilmesi ile sonuçlanmıştır.

Anahtar Kelimeler:

Bilyalı öğütme, Nitrür tozları, Karışım, Nano toz

Cost Effective Production of Nitride Based Materials by High Energy Ball Milling

In the production of ceramic materials, both performance increase and economy are the two most important parameters. The common parameter in the management of these two processes is the control of the initial powder size of the raw materials. Nitride-based advanced technology materials provide significant advantages due to their purity, and micron size in the production process. However, the sintering of these materials is both difficult and expensive. The additives used in the sintering process may cause deterioration in the using properties of the material in the final product. Due to its properties, hardness and abrasiveness, it cannot be easily possible reduce their particle size to the desired size using the grinding process. However, it is possible to make this process be active, short and efficient by suspending the powders in suspension. Therefore, it is possible to increasing the powder-powder, powder-ball interaction in the system. In this study, the process was controlled by using different stabilizers and medium. Thus, the size of nitride powders having a grain size of 500 m was reduced to 100nm, resulting in improved sintering and mechanical behavior.

Keywords:

Ball milling, Nitride powder, Medium, Nano powder,

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