Neutron Diffraction and Neutron Radiography Investigation into Powder Sintering of Ti/Al and TiH{sub 2}/Al Compacts

Journal Article · Fri Feb 15 04:00:00 EST 2019 · Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science

DOI:https://doi.org/10.1007/S11663-018-1470-X· OSTI ID:22933577

Chen, Gang ^[1]; Liss, Klaus-Dieter ^[2]; Cao, Peng ^[3]; Lu, Xin; Qu, Xuanhui ^[1]

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1. University of Science and Technology Beijing, Institute for Advanced Materials and Technology (China)
2. Guangdong Technion Israel Institute of Technology, Material Science and Engineering Program (China)
3. The University of Auckland, Department of Chemical and Materials Engineering (New Zealand)

Sintering behaviors of two types of powder compact, i.e., Ti/Al and TiH{sub 2}/Al, under vacuum were studied using in situ neutron diffraction, in situ thermal dilatometric measurement, and ex situ neutron radiography. Their densification, microstructure, hydrogen concentration, and phase transformation features were compared. The results indicate that the predominant phase identified in the samples sintered from both compacts is γ-TiAl phase with minor Ti{sub 3}Al phase. Dehydrogenation of TiH{sub 2} plays a decisive role in the sintering behavior and the resultant microstructure. In comparison with the Ti/Al compact, dehydrogenation occurring in the TiH{sub 2}/Al compact leads to a higher level of densification and faster sintering kinetics.

• OSTI ID: 22933577
• Journal Information: Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science, Journal Name: Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science Journal Issue: 1 Vol. 50; ISSN 1073-5615; ISSN MTBSEO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
CONCENTRATION RATIO
DEHYDROGENATION
HYDROGEN
MICROSTRUCTURE
NEUTRON DIFFRACTION
NEUTRON RADIOGRAPHY
PHASE TRANSFORMATIONS
POWDERS
SINTERING
TITANIUM HYDRIDES