Next Article in Journal
Rapid Growth of KDP Crystals in the [101] Direction
Previous Article in Journal
Experimental Investigations on the Performances of Composite Building Materials Based on Industrial Crops and Volcanic Rocks
Open AccessArticle

The Cyclic Oxidation and Hardness Characteristics of Thermally Exposed Titanium Prepared by Inductive Sintering-Assisted Powder Metallurgy

1
Department of Mechanical Engineering, Al Imam Mohammad Ibn Saud Islamic University (IMSIU), PO. BOX 5701, Riyadh 11432, Saudi Arabia
2
Center of Excellence for Research in Engineering Materials (CEREM), King Saud University, P.O. Box 800, Al-Riyadh 11421, Saudi Arabia
3
Electrochemistry and Corrosion Laboratory, Department of Physical Chemistry, National Research Centre, El-Behoth St. 33, Dokki, Cairo 12622, Egypt
4
Research Center for Physics, Indonesian Institute of Sciences, Tangerang Selatan 15310, Indonesia
5
Mechanical Design and Materials Department, Faculty of Energy Engineering, Aswan University, Aswan 81521, Egypt
*
Author to whom correspondence should be addressed.
Crystals 2020, 10(2), 104; https://doi.org/10.3390/cryst10020104
Received: 14 January 2020 / Revised: 6 February 2020 / Accepted: 8 February 2020 / Published: 11 February 2020
(This article belongs to the Section Crystalline Materials)
The oxidation and hardness of thermally exposed titanium (Ti) prepared using inductive sintering-assisted powder metallurgy was evaluated through cyclic tests in air at 700–900 C for 100 h (5 cycles). In general, the oxidation kinetics of the Ti samples followed the parabolic law and their oxidation rates increased with increasing oxidation temperatures. The rutile form of titanium dioxide (TiO2) was detected by X-ray diffraction in the oxide scales after oxidation at 700 C and 900 C. Furthermore, the TiO2 grain size and thickness were significantly influenced by an increase in the oxidation temperature. Lastly, the formation of rutile as a single-phase on the surface of oxidized Ti enhanced the hardness of the oxide scales, whereas the substrate had lower hardness values than the oxide scales due to diffusion of Ti atoms at the surface to form the TiO2 oxide scales.
Keywords: titanium; oxidation; X-ray diffraction; microstructure; hardness titanium; oxidation; X-ray diffraction; microstructure; hardness
MDPI and ACS Style

H. Latief, F.; Sherif, E.-S.; Wismogroho, A.S.; Widayatno, W.B.; S. Abdo, H. The Cyclic Oxidation and Hardness Characteristics of Thermally Exposed Titanium Prepared by Inductive Sintering-Assisted Powder Metallurgy. Crystals 2020, 10, 104.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop