Hydrogen vibrational excitation spectra of CaF2-type metal hydrides synthesized from Ti-based BCC solid solution alloys

Yumhxo Nakamura; Takashi Kamiyama; Etsuo Akiba

doi:10.2320/matertrans.MA201014

Hydrogen vibrational excitation spectra of CaF₂-type metal hydrides synthesized from Ti-based BCC solid solution alloys

Yumhxo Nakamura, Takashi Kamiyama, Etsuo Akiba

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

1 Citation (Scopus)

Abstract

Hydrogen vibrational excitation was studied for CaF₂-type metal hydrides synthesized from Ti-based BCC solid solution alloys using inelastic incoherent neutron scattering (IINS). Ti_1.0V_1.1Mn _0.9H_4.5 and Ti_1.0V_1.2Cr _1.1H_4.8 showed UNS spectra similar to that reported for TiH₂. The first three peaks were isolated but the higher excitation peaks were not clear. Analysis of the spectra using curve-fitting with Gauss functions revealed that the hydrogen vibration of Ti_1.0V _1.1Mn_0.9H_4.5 is harmonic but that of the TÍ0.7V12CrIiH48 is deviated from harmonic, which reflects a trumpet-type potential. The relation between metal-hydrogen distance and vibrational excitation energy for the above two hydrides and Ti_1.1Cr _1.4Mo_0.9H_4.8 was compared with a series of CaF₂-type binary metal hydrides. All the hydrides of the Ti-based alloys had lower vibrational excitation energies than the binary metal hydrides for the corresponding metal-hydrogen distances.

Original language	English
Pages (from-to)	591-594
Number of pages	4
Journal	Materials Transactions
Volume	52
Issue number	4
DOIs	https://doi.org/10.2320/matertrans.MA201014
Publication status	Published - Apr 2011
Externally published	Yes

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Hydrogen vibrational excitation spectra of CaF2-type metal hydrides synthesized from Ti-based BCC solid solution alloys",

abstract = "Hydrogen vibrational excitation was studied for CaF2-type metal hydrides synthesized from Ti-based BCC solid solution alloys using inelastic incoherent neutron scattering (IINS). Ti1.0V1.1Mn 0.9H4.5 and Ti1.0V1.2Cr 1.1H4.8 showed UNS spectra similar to that reported for TiH2. The first three peaks were isolated but the higher excitation peaks were not clear. Analysis of the spectra using curve-fitting with Gauss functions revealed that the hydrogen vibration of Ti1.0V 1.1Mn0.9H4.5 is harmonic but that of the T{\'I}0.7V12CrIiH48 is deviated from harmonic, which reflects a trumpet-type potential. The relation between metal-hydrogen distance and vibrational excitation energy for the above two hydrides and Ti1.1Cr 1.4Mo0.9H4.8 was compared with a series of CaF2-type binary metal hydrides. All the hydrides of the Ti-based alloys had lower vibrational excitation energies than the binary metal hydrides for the corresponding metal-hydrogen distances.",

author = "Yumhxo Nakamura and Takashi Kamiyama and Etsuo Akiba",

year = "2011",

month = apr,

doi = "10.2320/matertrans.MA201014",

language = "English",

volume = "52",

pages = "591--594",

journal = "Materials Transactions",

issn = "0916-1821",

publisher = "The Japan Institute of Metals and Materials",

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}

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T1 - Hydrogen vibrational excitation spectra of CaF2-type metal hydrides synthesized from Ti-based BCC solid solution alloys

AU - Nakamura, Yumhxo

AU - Kamiyama, Takashi

AU - Akiba, Etsuo

PY - 2011/4

Y1 - 2011/4

N2 - Hydrogen vibrational excitation was studied for CaF2-type metal hydrides synthesized from Ti-based BCC solid solution alloys using inelastic incoherent neutron scattering (IINS). Ti1.0V1.1Mn 0.9H4.5 and Ti1.0V1.2Cr 1.1H4.8 showed UNS spectra similar to that reported for TiH2. The first three peaks were isolated but the higher excitation peaks were not clear. Analysis of the spectra using curve-fitting with Gauss functions revealed that the hydrogen vibration of Ti1.0V 1.1Mn0.9H4.5 is harmonic but that of the TÍ0.7V12CrIiH48 is deviated from harmonic, which reflects a trumpet-type potential. The relation between metal-hydrogen distance and vibrational excitation energy for the above two hydrides and Ti1.1Cr 1.4Mo0.9H4.8 was compared with a series of CaF2-type binary metal hydrides. All the hydrides of the Ti-based alloys had lower vibrational excitation energies than the binary metal hydrides for the corresponding metal-hydrogen distances.

AB - Hydrogen vibrational excitation was studied for CaF2-type metal hydrides synthesized from Ti-based BCC solid solution alloys using inelastic incoherent neutron scattering (IINS). Ti1.0V1.1Mn 0.9H4.5 and Ti1.0V1.2Cr 1.1H4.8 showed UNS spectra similar to that reported for TiH2. The first three peaks were isolated but the higher excitation peaks were not clear. Analysis of the spectra using curve-fitting with Gauss functions revealed that the hydrogen vibration of Ti1.0V 1.1Mn0.9H4.5 is harmonic but that of the TÍ0.7V12CrIiH48 is deviated from harmonic, which reflects a trumpet-type potential. The relation between metal-hydrogen distance and vibrational excitation energy for the above two hydrides and Ti1.1Cr 1.4Mo0.9H4.8 was compared with a series of CaF2-type binary metal hydrides. All the hydrides of the Ti-based alloys had lower vibrational excitation energies than the binary metal hydrides for the corresponding metal-hydrogen distances.

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Hydrogen vibrational excitation spectra of CaF₂-type metal hydrides synthesized from Ti-based BCC solid solution alloys

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