Wenhuai Tian

Microstructure and phase composition of hypoeutectic Te–Bi alloy as evaporation source for photoelectric cathode

AbstractA hypoeutectic 60Te–40Bi alloy in mass percent was designed as a tellurium atom evaporation source instead of pure tellurium for an ultraviolet detection photocathode. The alloy was prepared by slow solidification at about 10−2 K·s−1. The microstructure, crystal structure, chemical composition, and crystallographic orientation of each phase in the as-prepared alloy were investigated by optical microscopy, scanning electron microscopy, X-ray diffraction, electron backscatter diffraction, and transmission electron microscopy. The experimental results suggest that the as-prepared 60Te–40Bi alloy consists of primary Bi2Te3 and eutectic Bi2Te3/Te phases. The primary Bi2Te3 phase has the characteristics of faceted growth. The eutectic Bi2Te3 phase is encased by the eutectic Te phase in the eutectic structure. The purity of the eutectic Te phase reaches 100wt% owing to the slow solidification. In the eutectic phases, the crystallographic orientation relationship between Bi2Te3 and Te is confirmed as

Method for preparing electroformed nickel metallographic sample and displaying constitution

{[0001]_{B{i_2}T{e_3}}}//{[1bar 21bar 3]_{Te}}

Technology for preparing Ni shaped charge liner using sulfamic acid nickel electroforming solution

[0001]Bi2Te3//[12¯13¯]Te and the direction of Te phase parallel to

Method for controlling electroforming nickel layer hardness and grain size by pulse parameter

{[11bar 20]_{B{i_2}T{e_3}}}

Apparatus for preparing nickel shaped charge liner by electroforming method

[112¯0]Bi2Te3n is deviated by 18° from Te