Analysis of oxidation behavior of Ni-base superalloys by laser-induced breakdown spectroscopy

Abstract

The application of laser-induced breakdown spectroscopy (LIBS) to elemental depth profile analysis of high temperature oxidation behavior of Ni-based superalloys is presented. An oxidation test of two Ni-base superalloys, Alloy 617 and Haynes 230, to be considered as the most promising candidates for very high temperature reactor (VHTR), was carried out in dry air at 900 C. A duplex external oxide layer of MnCr 2 O 4 and Cr 2 O 3 with internal Al 2 O 3 oxides was mainly formed in both alloys. In addition, in Alloy 617, Ni and Ti enriched oxides were observed at the surface unlike in Haynes 230, and Alloy 617 was more susceptible to intergranular oxidation. Generally, the oxidation of Alloy 617 was more extensive than that of Haynes 230, i.e. Alloy 617 formed a thicker oxide layer of $8 mm, compared with Haynes 230 with an oxide layer of $5 mm in thickness after 1000 h. Depth profiles obtained by LIBS are found to be in broad agreement with those obtained by established techniques such as X-ray diffraction (XRD), scanning electron microscopy coupled to energy dispersive X-ray spectrometry (SEM-EDS), and secondary ion mass spectrometry (SIMS).

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

“…Rust must be completely removed from these steel containers to ensure they are free of arsenic. The oxidation of nickel-based super alloys was studied by Kim et al 18 by using LIBS to do elemental depth proling. A complex outer layer consisting of MnCr 2 O 4 and Cr 2 O 3 was found along with an inner layer of Al 2 O 3 from both Alloy 617 and Haynes 230 super alloys.…”

In‐situ and quantitative analysis of aged silicone rubber materials with laser‐induced breakdown spectroscopy

“…For corrosion of metal and ageing of inorganic or organic materials, the changes of composition even element type from sample surface to inner part would be the main influence factors for material properties. Many studies had researched the metal or alloy corrosion or diffusion, such as Ni [9], Zn Mg [10], Al [11] and so on. Few organic composites were also studied, such as high density polyethylene (HDPE) [12] and ethylene propylene diene monomer (EPDM) [13].…”

Compositional effect of Cr contamination susceptibility of La9.83Si6−x−yAlxFeyO26±δ apatite-type SOFC electrolytes in contact with CROFER 22 APU

“…The depth proling of LIBS have found many applications in metals, analyzing multilayer metallic coatings, 56,57 protective paint coatings of the naval sector 58 and the oxidation behavior of metal-based super alloys. 59 On the other hand, in the eld of ceramics, LIBS has been mainly applied for the depth prole analysis of cultural heritage materials such as unglazed ceramics 60,61 and the discrimination between glaze and main body of attic black ceramics, 51 while on technical ceramics, the analysis of yttria stabilized zirconia ceramic layer thermal barrier coating on a super alloy substrate 62 has been reported. A thorough review with recent LIBS applications in various elds was recently published by Carter et al 63 and references therein.…”