PEMILIHAN MATERIAL PELAPISAN UNTUK PENINGKATAN DAYA TAHAN BILAH TURBIN PESAWAT
Abstract
Pendekatan material baru yang canggih adalah mutlak untuk menjawab tantangan wahana udara pada masa kini. Adanya beban struktural dan keadaan ekstrim pada saat beroperasi meliputi temperatur dan tekanan tinggi menjadi parameter utama dalam pemilihan material baru yang akan digunakan. Penelitian ini menyajikan pemilihan kandidat material yang cocok untuk penghalang termal pada bilah turbin pesawat. Berbagai kegagalan bilah turbin yang selama ini dialami diantaranya ketahanan termal, oksidasi suhu tinggi, dan kelelahan siklus tinggi yang kemudian dijadikan acuan dalam melakukan pemilihan material baru. Didapati paduan superalloy berbasis nikel memiliki batasan dalam kinerja temperatur tinggi dan ketahanan fisik yang tinggi dari komposit menjadi perhatian khusus, karena merupakan properti utama yang fokus untuk aplikasi bilah pada mesin turbin gas pesawat terbang. Sehingga dilakukan komposit dengan material baru yang kuat pada kondisi operasi pada 12000C, yakni material dengan struktur keramik seperti SiC dan Si3N4 serta material dengan sturktur silisida seperti MoSi2.References
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