Yıl 2018, Cilt 6, Sayı 1, Sayfalar 11 - 26 2018-01-31

Niyobyum Altlık Metali Üzerinde Oksidasyona Dayanıklı Bir Yüzey Kaplamasının Geliştirilmesi
Development of an Oxidation Resistance Surface Coating on Niobium Base Metal

Candan Sen Elkoca [1]

197 185

Nb (niobium) and Nb-based alloys are promising refractory materials for use at high temperatures. However, due to the weak resistance to high temperature oxidation, a dramatic modification in oxidation resistance is required to use Nb-based refractory materials. Alloying Nb with other elements improves its mechanical properties and oxidation resistance to some extent. An improvement in oxidation resistance by forming Al (aluminum) based coating with dense Al2O3 by utilizing different methods seems a prospective way for developing Nb-based refractory materials.

 

In the current study, halide activated pack cementation (HAPC) and subsequent plasma electrolytic oxidation (PEO) were combined to form an oxidation-resistant coating on niobium base metal. Prospective Al2O3 phases in amorphous or various kind of crystalline forms at the top were formed by anodic oxidation of cementation layer and modified to oxidation resistant a-Al2O3 by subsequent annealing at 1000oC for 2 hours in argon gas.

 

Comparing weight changes after oxidation tests shows that formed protective oxide film has a noticeable positive effect on the protection of Nb metal at high temperatures.

Nb (niobium) and Nb-based alloys are promising refractory materials for use at high temperatures. However, due to the weak resistance to high temperature oxidation, a dramatic modification in oxidation resistance is required to use Nb-based refractory materials. Alloying Nb with other elements improves its mechanical properties and oxidation resistance to some extent. An improvement in oxidation resistance by forming Al (aluminum) based coating with dense Al2O3 by utilizing different methods seems a prospective way for developing Nb-based refractory materials.

 

In the current study, halide activated pack cementation (HAPC) and subsequent plasma electrolytic oxidation (PEO) were combined to form an oxidation-resistant coating on niobium base metal. Prospective Al2O3 phases in amorphous or various kind of crystalline forms at the top were formed by anodic oxidation of cementation layer and modified to oxidation resistant a-Al2O3 by subsequent annealing at 1000oC for 2 hours in argon gas.

 

Comparing weight changes after oxidation tests shows that formed protective oxide film has a noticeable positive effect on the protection of Nb metal at high temperatures.

  • [1] N. B. Pilling and R. E. Bedworth, “The Oxidation of Metals at High Temperatures”, J. Inst. Met., 29, pp. 529-591, 1923.
  • [2] S. Majumdar, A. Arya, A., I. G. Sharma, A. K. Suri, and S. Banerjee, “Deposition of aluminide and silicide based protective coatings on niobium”, Applied Surface Science, 257 (2), pp. 635–640, 2010. [3] R. Bianco, M. A. Harper, and R. A. Rapp, “Codeposition elements by halide-. activated pack cementation”, JOM, 43 (11), pp. 20-25, 1991. [4] T. F. Kumon, R. O. Suzuki., and K. Ono, “Oxidation resistant coating for niobium by combining hot dipping in molten aluminum coating and anodic oxidation”, Journal of the Japan Institute of Metals, 59 (9), pp. 967–972, 1995. [5] K. Natesan, “Corrosion performance of iron aluminides in mixed-oxidant environments”, Materials Science and Engineering: A, 258 (1-2), pp. 126-134, 1998. [6] J. F. Stringer, R. I. Jaffee, and T. F. Kearns (Eds.), “High temperature of aerospace alloys, AGARD-CP-120”, London: Harford House, England, 1973. [7] M. Steinhorst and H. J. Grabke, “Oxidation of niobium aluminide NbAl3”, Materials Science and Engineering: A, 120-121 (1), pp. 55-59, 1989.
Birincil Dil en
Konular Mühendislik ve Temel Bilimler
Dergi Bölümü Makaleler
Yazarlar

Orcid: orcid.org/0000-0002-6123-835X
Yazar: Candan Sen Elkoca (Sorumlu Yazar)
Kurum: BÜLENT ECEVİT ÜNİVERSİTESİ
Ülke: Turkey


Bibtex @araştırma makalesi { dubited363872, journal = {Düzce Üniversitesi Bilim ve Teknoloji Dergisi}, issn = {}, eissn = {2148-2446}, address = {Düzce Üniversitesi}, year = {2018}, volume = {6}, pages = {11 - 26}, doi = {10.29130/dubited.363872}, title = {Development of an Oxidation Resistance Surface Coating on Niobium Base Metal}, key = {cite}, author = {Sen Elkoca, Candan} }
APA Sen Elkoca, C . (2018). Development of an Oxidation Resistance Surface Coating on Niobium Base Metal. Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 6 (1), 11-26. DOI: 10.29130/dubited.363872
MLA Sen Elkoca, C . "Development of an Oxidation Resistance Surface Coating on Niobium Base Metal". Düzce Üniversitesi Bilim ve Teknoloji Dergisi 6 (2018): 11-26 <http://dergipark.gov.tr/dubited/issue/34777/363872>
Chicago Sen Elkoca, C . "Development of an Oxidation Resistance Surface Coating on Niobium Base Metal". Düzce Üniversitesi Bilim ve Teknoloji Dergisi 6 (2018): 11-26
RIS TY - JOUR T1 - Development of an Oxidation Resistance Surface Coating on Niobium Base Metal AU - Candan Sen Elkoca Y1 - 2018 PY - 2018 N1 - doi: 10.29130/dubited.363872 DO - 10.29130/dubited.363872 T2 - Düzce Üniversitesi Bilim ve Teknoloji Dergisi JF - Journal JO - JOR SP - 11 EP - 26 VL - 6 IS - 1 SN - -2148-2446 M3 - doi: 10.29130/dubited.363872 UR - http://dx.doi.org/10.29130/dubited.363872 Y2 - 2017 ER -
EndNote %0 Düzce Üniversitesi Bilim ve Teknoloji Dergisi Development of an Oxidation Resistance Surface Coating on Niobium Base Metal %A Candan Sen Elkoca %T Development of an Oxidation Resistance Surface Coating on Niobium Base Metal %D 2018 %J Düzce Üniversitesi Bilim ve Teknoloji Dergisi %P -2148-2446 %V 6 %N 1 %R doi: 10.29130/dubited.363872 %U 10.29130/dubited.363872
ISNAD Sen Elkoca, Candan . "Niyobyum Altlık Metali Üzerinde Oksidasyona Dayanıklı Bir Yüzey Kaplamasının Geliştirilmesi". Düzce Üniversitesi Bilim ve Teknoloji Dergisi 6 / 1 (Ocak 2018): 11-26. http://dx.doi.org/10.29130/dubited.363872