We report on the anelastic behavior of a cyclically loaded Zr_62.5Fe₅Cu_22.5Al₁₀ bulk metallic glass well below its yield strength. The dynamic mechanical behavior of the glass is discussed on the basis of its structural and thermodynamic properties before and after tests. We show how the kinetically frozen anelastic deformation accumulates at room temperature and causes a structural relaxation and densification of the glass and further leads to its partial crystallization.

Chemical vapor deposited diamond disks have been successfully applied as the vacuum windows for infrared ${\mathrm{CO}}_2$ laser interferometry and polarimetry used in electron density measurement in the JT-60U tokamak. In comparison with the conventional zinc–selenide windows, the Faraday rotation component of diamond windows was negligible. This results in an improvement of the Faraday rotation measurement of tokamak plasma by polarimetry.

Bulk glassy alloy rods of diameters 18 and 20 mm were formed during the tiltcasting of Zr₆₀Al₁₀Ni₁₀Cu₂₀. A further increase in the rod diameter to 22 mm resulted in the formation of a mixed structure with approximately 60 vol% glassy phase and 40 vol% crystalline phase, which comprised the central region of the transverse cross-section of the alloy rod. The glass transition temperature (T_g), onset temperature of crystallization (T_x), and liquidus temperature (T_l) were measured to be 666 K, 768 K, and 1153 K, respectively, and the resultant ΔT_x (=T_x−T_g), T_g⁄T_l, and γ (=T_x⁄(T_g+T_l)) values were 102 K, 0.578, and 0.422, respectively. The high glass-forming ability of supercooled liquids is attributed to the high resistance of the liquids against crystallization due to the large ΔT_x and high T_g⁄T_l and γ values. For the alloy rod of diameter 20 mm, the Young’s modulus, yield strength, elastic strain, and plastic strain under a uniaxial compressive load are 80 GPa, 1820 MPa, 0.022, and 0.060, respectively; the plastic strain of the rod with diameter 20 mm is greater than that (0.04) of the glassy alloy rod of diameter 2 mm, although there exist no appreciable differences between their strength levels and fracture behaviors. The success of formation of the large-sized Zr-based bulk glassy alloy rod, which exhibits large plastic strains in conjunction with high strength levels, is promising with regard to further extension of the applications of such highly functional materials.

Ni, Cu and Au ions were implanted into silicon (111) wafers at irradiation energies of 80–230 MeV with doses of 0.1–5.0×10¹⁴ atoms/cm². X-ray rocking curves from the wafers were investigated using the dynamical diffraction theory. Strain profiles obtained by curve fitting revealed that the energy loss per unit length (energy deposition) due to a nuclear collision played an important role in the expansion of the lattice spacing. The height of the main peak of the strain profile was proportional to the dose of ion implantation. In the case of Au implantation, an additional distortion near the crystal surface and a uniform expansion of the lattice spacing in the distorted layer were observed.