Neutron Diffraction and Neutron Radiography Investigation into Powder Sintering of Ti/Al and TiH2/Al Compacts

Gang Chen; Klaus Dieter Liss; Peng Cao; Xin Lu; Xuanhui Qu

doi:10.1007/s11663-018-1470-x

Neutron Diffraction and Neutron Radiography Investigation into Powder Sintering of Ti/Al and TiH₂/Al Compacts

Gang Chen^*, Klaus Dieter Liss, Peng Cao, Xin Lu, Xuanhui Qu

^*Corresponding author for this work

Materials Science and Engineering

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Abstract

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.

Original language	English
Pages (from-to)	429-437
Number of pages	9
Journal	Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume	50
Issue number	1
DOIs	https://doi.org/10.1007/s11663-018-1470-x
State	Published - 15 Feb 2019

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title = "Neutron Diffraction and Neutron Radiography Investigation into Powder Sintering of Ti/Al and TiH2/Al Compacts",

abstract = "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.",

author = "Gang Chen and Liss, {Klaus Dieter} and Peng Cao and Xin Lu and Xuanhui Qu",

note = "Publisher Copyright: {\textcopyright} 2018, The Minerals, Metals & Materials Society and ASM International.",

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Neutron Diffraction and Neutron Radiography Investigation into Powder Sintering of Ti/Al and TiH₂/Al Compacts. / Chen, Gang; Liss, Klaus Dieter; Cao, Peng et al.

In: Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, Vol. 50, No. 1, 15.02.2019, p. 429-437.

Research output: Contribution to journal › Article › peer-review

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

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 - 文章

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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 -

Neutron Diffraction and Neutron Radiography Investigation into Powder Sintering of Ti/Al and TiH₂/Al Compacts

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