PROTON MAGNETIC RESONANCE IN TITANIUM AND ZIRCONIUM HYDRIDES (in Russian)
Proton magnetic resonance in titanium and zirconium hydrides was measured in a magnetic field of 21449 k hertz frequency and 5035 gauss field intensity. Specimens of powdered hydrides with hydrogen contents TiH/sub 1.98/, TiH/sub 1.75/, TiH/sub 1.05/, TiH/sub 0.65/, TiH/sub 0.50/, TiH/s ub 0.20/, and ZrH/sub 2/ were prepared in a vacuum at various temperatures. Titanium hydrides with less than 20 at.% H are single-phase hydrides with hexagonal lattices with a/ c = 1.62; with 20 to 55 at.% H the hydrides become two-phase with a hexagonal alpha phase and face-centered cubic BETA phase. With hydrogen content exceeding 55 at.% the hydrides are single phased with a face-centered cubic lattice and increasing periods from 4.40 to 4.45 kX. Proton paramagnetic resonance expands in hydrogen-rich BETA hydrides, indicating slowed proton motion and alterations in hydrogen-metal bonds. The second and fourth p.m.r. moments in TiH/sub 1.98/ and ZrH/sub 2/ were measured and correlated with the values for the second moments in molecular hydrogen diffused into octahedron and tetrahedron pores and for separate proton diffusion into tetrahedron pores. The second moment for titanium and zirconium hydrides was found to approximate that of proton diffusion into the tetrahedron pores. The difference in the calculated and experimental magnitudes for TiH/sub 1.98/ and ZrH/sub 2/ second moments indicates a difference in the bonds between protons and metal atoms. It is assumed that the covalent bond of ZrH/sub 2/ induces the tetrahedron distortion of the lattice, while the metallic bond of TiH/sub 1.98/ produces a more symmetric cubic lattice. (R.V.J.)
- Research Organization:
- Stalin Moscow Inst. of Steel
- NSA Number:
- NSA-13-021478
- OSTI ID:
- 4209485
- Journal Information:
- Doklady Akad. Nauk S.S.S.R., Journal Name: Doklady Akad. Nauk S.S.S.R. Vol. Vol: 127
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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