Jurnal

Effect of depth implantation of lanthanum on the oxidation of Fe80Cr20 based alloys

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The aim of this study is to investigate the effect of
depth implantation of lanthanum on the oxidation of Fe80Cr20
alloys. Intermetallic FeCr was developed by mechanical
alloying technique with milling time 40 h and 60 h respectively
and followed by hot compaction process at a temperature of
1273 K and pressure of 25 MPa. The specimens were
implanted with Lanthanum dopant with doses of 1017 ions/cm2
with different depth due to different density. Isothermal
oxidizing behaviors of Fe80Cr20 alloys was carried out in a
resistance heated furnace in 1 atm of laboratory air at constant
at temperatures of 1173 K and 1273 K. X-ray diffraction
(XRD) and Scanning Electron Microscopy (SEM) followed by
Energy Dispersive X-ray spectroscopy (EDX) analysis were
used to examine the microstructure, morphology
characterization and the influence of lanthanum dopant and its
influence on the formation of oxides layer of specimens after
oxidation process. The oxide scales formed on both specimens
at 1173 K in which consisted of thin chromia (Cr2O3) dan FeO
with a composition similar percentage. Lanthanum mainly
existed in the outer surface of Cr2O3 oxide film in the form of
La2O3 and La2CrO6. Meanwhile, the oxide scale formed at
1273 K mainly consisted of α-(FeCr)2O3, α-La2CrO6, and
γ-Fe2O3. With different dopant concentration in the surface
depth of specimens, it will cause the formation of different
oxidation layer on the surface of the specimens after oxidation.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

620.11 SAR e

Penerbit

London : WCE., 2010

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

620.11 SAR e

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

Vol. 11

Subjek

X-ray diffraction
FeCr
Oxide_Layer
Lanthanum

Info Detail Spesifik

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Pernyataan Tanggungjawab

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