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To improve the safety of octahdro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX), a submicron energetic material, 1,3,5-triamino-2,4,6-trinitrobenzene (TATB), was introduced to coat HMX by a novel method. This novel method contained the reaction crystallisation and the solvent–non-solvent method. X-ray diffraction, scanning electron microscope, and optical microscopy analyses showed that a homogeneous...
Sn-Zn-Cu-Bi lead free solder is one of promising candidates to replace Sn-Pb eutectic solder because of its low cost, good wettability to Cu, low melt temperature and without toxicity. The microstructure and property of Sn-Zn-Cu-Bi lead free solder has been investigated in this paper. The wettability to Cu substrate of solders with different Bi concent was investigated by spread test. Solder melt...
Fine and ultra-fine powders are actively studied in a broad and interdisciplinary area of nanotechnology. This paper presents the complex of well-grounded solutions for direct production of nanopowders by the exploding wire method. The influence of initial conditions on the properties of powders is discussed. The basic factors are as follows: the level and the uniformity of heating, the heating rate,...
Clathrate Ba8Al16Si30 was produced by arc melting and hot-pressed and effects on the microstructure and thermoelectric properties were investigated. The ingot was crushed into powders in a glove box. The powders were hot-pressed at 1,073, 1,123 and 1,173K using a stress of 60 MPa for 2 hours. The phase transformation behavior of hot-pressed Ba8Al16Si30 was examined by thermo-gravimetric analysis (TGA),...
Summary form only given. A number of metallic glasses that exhibit a wide supercooled liquid region before crystallization and a high glass-forming ability have been discovered. These metallic glasses exhibit useful properties such as high strength and high stiffness and can be fabricated from the melt in a bulk form with a thickness of ~ 10 mm. The high glass-forming ability facilitates the formation...
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