TY - JOUR
T1 - Neutron Diffraction and Neutron Radiography Investigation into Powder Sintering of Ti/Al and TiH2/Al Compacts
AU - Chen, Gang
AU - Liss, Klaus Dieter
AU - Cao, Peng
AU - Lu, Xin
AU - Qu, Xuanhui
N1 - Funding Information:
GC gratefully acknowledges the funding from National Natural Science Foundation of China (Contract No.: 51604228) and the Fundamental Research Funds for the Central Universities (No.: 06500092). This study is also supported by State Key Lab of Advanced Metals and Materials, University of Science and Technology Beijing, P.R. China (No.: 2018-Z02). PC appreciates the financial support from Ministry of Business Innovation and Employment (MBIE), New Zealand. The authors also acknowledge the Australian Nuclear Science and Technology Organisation (ANSTO) for providing the neutron research facilities used in this study. The authors would like to thank the Australian Institute of Nuclear Science and Engineering (AINSE) Ltd. and ANSTO for providing funds (Nos.: P3430 and P4788) to enable us conduct the study on WOMBAT and DINGO.
Publisher Copyright:
© 2018, The Minerals, Metals & Materials Society and ASM International.
PY - 2019/2/15
Y1 - 2019/2/15
N2 - Sintering behaviors of two types of powder compact, i.e., Ti/Al and TiH2/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 Ti3Al phase. Dehydrogenation of TiH2 plays a decisive role in the sintering behavior and the resultant microstructure. In comparison with the Ti/Al compact, dehydrogenation occurring in the TiH2/Al compact leads to a higher level of densification and faster sintering kinetics.
AB - Sintering behaviors of two types of powder compact, i.e., Ti/Al and TiH2/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 Ti3Al phase. Dehydrogenation of TiH2 plays a decisive role in the sintering behavior and the resultant microstructure. In comparison with the Ti/Al compact, dehydrogenation occurring in the TiH2/Al compact leads to a higher level of densification and faster sintering kinetics.
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U2 - 10.1007/s11663-018-1470-x
DO - 10.1007/s11663-018-1470-x
M3 - Article
AN - SCOPUS:85057791799
VL - 50
SP - 429
EP - 437
JO - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
JF - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
SN - 1073-5615
IS - 1
ER -