Protium absorption properties and protide formations of Ti–Cr–V alloys

Tamura, Takuya; Kazumi, Takashi; Kamegawa, Atsunori; Takamura, Hitoshi; Okada, Masuo

doi:10.1016/s0925-8388(02)01249-5

Cited by 86 publications

(54 citation statements)

References 14 publications

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“…Ti-Cr-20V alloys containing more than 56 at%Cr, were found to absorb up to H/M = 1 because of the formation of the monoprotides. 23,24) On the basis of these results, the present authors reported the region with the higher protium desorption capacity (about 2.6 mass%; 9-0.01 MPa) in the Ti-Cr-V alloys. 24) Moreover, the present authers reported that the appearance region of the mono-dueteride was more Cr-rich compositions than that of the mono-protides.…”

Section: Introductionsupporting

confidence: 63%

“…23,24) On the basis of these results, the present authors reported the region with the higher protium desorption capacity (about 2.6 mass%; 9-0.01 MPa) in the Ti-Cr-V alloys. 24) Moreover, the present authers reported that the appearance region of the mono-dueteride was more Cr-rich compositions than that of the mono-protides. 25) For example, Ti-Cr-20V alloys containing more than 60 at%Cr absorb deuterium up to D/M = 1.…”

Section: Introductionsupporting

confidence: 63%

“…These FCC and hcp phases are considered to be a di-protide and a monoprotide, respectively. 23,24) For the sample at the (B)-point without deuterium treatment, 3 different Bragg peaks are observed. One is the FCC Bragg peaks from a di-protide.…”

Section: Protium Storage Properties After Absorbing Deuteriummentioning

confidence: 99%

“…This fcc phase is considered to be a mono-protide. 23,24) However, some Bragg peaks cannot be identified. These results show that increasing protium desorption capacity for deuterium treatment is caused by increasing di-protide formation and decreasing mono-protide formation.…”

Section: Protium Storage Properties After Absorbing Deuteriummentioning

confidence: 99%

“…The present authors reported that decreasing the V content and increasing the Cr content turned out to shift the beginning of the plateau regions to the low protium concentration, and higher protium desorption capacity was achieved by increasing the Cr content and controlling measurement temperature in order to control the desorption plateau pressure near atmospheric pressure for the alloys containing less than 40 at%V (at% is abbreviated hereafter). [21][22][23][24] However, the Cr-rich alloys, e.g. Ti-Cr-20V alloys containing more than 56 at%Cr, were found to absorb up to H/M = 1 because of the formation of the monoprotides.…”

Section: Introductionmentioning

confidence: 99%

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Isotope Effects on Protium and Deuterium Absorption Properties in Ti-56 at%Cr-20 at%V Alloy

et al. 2004

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Ti-Cr-V alloys are known to absorb protium (hydrogen atom) up to H/M = 2. However, the Cr-rich alloys, e.g. Ti-Cr-20 at%V alloys containing more than 56 at%Cr, absorb up to H/M = 1 because of the formation of the mono-protides (mono-hydrides). The appearance region of the mono-dueteride was found to be more Cr-rich compositions than that of the mono-protides. For example, Ti-Cr-20 at%V alloys containing more than 60 at%Cr absorb deuterium up to D/M = 1. Therefore, Ti-56 at%Cr-20 at%V alloy absorbs protium up to H/M = 1, but deuterium up to D/M = 2. As higher protium desorption capacity is achieved by increasing the Cr content in the region of the di-protide, there is some possibility of increasing the protium desorption capacity in Ti-Cr-V alloys using the isotope effects on absorption-desorption properties of the Ti-56 at%Cr-20 at%V alloy. This paper aims to clarify the isotope effects on protium and deuterium absorption properties in the Ti-56 at%Cr-20 at%V alloy. It was found that the memory effect for the absorption plateau pressure appears only once when deuterium was absorbed after desorbing protium, and the memory effect for the absorption capacity appears when protium was absorbed after desorbing deuterium. The protium desorption capacity after deuterium treatment, namely, after desorbing deuterium showed twice as high as that without deuterium treatment in the Ti-56 at%Cr-20 at%V alloy. Increasing protium desorption capacity for deuterium treatment was caused by increasing di-protide formation and decreasing mono-protide formation.

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Section: Introductionsupporting

confidence: 63%