Paduan zirkonium

Batang kendali zirkonium (no 6) pada reaktor nuklir.

Paduan zirkonium adalah larutan padat dari zirkonium atau logam lainnya, subkelompok umum memiliki merek dagang Zircaloy. Zirkonium memiliki daya serap yang sangat rendah dari neutron termal, kekerasan tinggi, keuletan dan ketahanan korosi. Salah satu kegunaan utama paduan zirkonium adalah dalam teknologi nuklir, sebagai kelongsong dari batang bahan bakar di reaktor nuklir, terutama reaktor air. Komposisi khas paduan zirkonium tingkat nuklir lebih dari 95 persen berat zirkonium dan kurang dari 2% timah, niobium, besi, kromium, nikel dan logam lainnya, yang ditambahkan untuk meningkatkan sifat mekanik dan ketahanan korosi.[1][2][3][4][5]

Reaktor pendinginan air paduan zirkonium meningkatkan persyaratan ketahanannya terhadap korosi nodular terkait oksidasi. Selanjutnya, reaksi oksidatif zirkonium dengan air melepaskan gas hidrogen, yang sebagian berdifusi ke dalam paduan dan membentuk hidrida zirkonium. Hidrida kurang padat dan lebih lemah secara mekanis daripada paduannya; pembentukannya menghasilkan terik dan retaknya kelongsong – sebuah fenomena yang dikenal sebagai penggetasan hidrogen.

Referensi

  1. ^ Mary Eagleson (1994). Concise encyclopedia chemistry. Walter de Gruyter. hlm. 1199–. ISBN 978-3-11-011451-5. Diakses tanggal 18 March 2011. 
  2. ^ Carpenter, G.J.C.; Watters, J.F. (1978). "An in-situ study of the dissolution of γ-zirconium hydride in zirconium". Journal of Nuclear Materials. 73 (2): 190–197. Bibcode:1978JNuM...73..190C. doi:10.1016/0022-3115(78)90559-7. 
  3. ^ Nuclear Fuel Fabrication Diarsipkan July 26, 2011, di Wayback Machine., Fuel Fabrication Diarsipkan July 26, 2011, di Wayback Machine. World Nuclear Association, March 2010
  4. ^ George S. Brady; Henry R. Clauser; John A. Vaccari (24 July 2002). Materials Handbook (edisi ke-15th). McGraw-Hill Professional. hlm. 1063–. ISBN 978-0-07-136076-0. Diakses tanggal 18 March 2011. 
  5. ^ Peter Rudling; Alfred Strasser; Friedrich Garzarolli (2007). Welding of Zirconium Alloys (PDF). Sweden: Advanced Nuclear Technology International. Diarsipkan dari versi asli (PDF) tanggal 2012-01-18. Diakses tanggal 2021-10-14. 

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