Well-crystallized jadeite was successfully synthesized from its glass phase under high pressure and high temperature conditions by simulating the mineralization principle of natural jadeite.Some of the synthetic jadeite samples present highly saturated colors and smooth finish which are the main fea...

The magnetically driven device CQ-4 was used to drive a copper flyer plate to impact a pure iron specimen to achieve one dimensional plane-wave loading, and a high-accurate Doppler pin system was utilized to record the free-surface velocity histories of the flyer and specimen.The results indicate th...

The pure bulk tungsten and W-TiC alloy were sintered by high-pressure and high-temperature (HPHT) method, and their densification behavior and hardness were systematically investigated.It is found that the pure tungsten sample sintered at the circumstance of 5.0 GPa and 1 500 ℃ for 15 min exhibits u...

The longitudinal and shear sound velocities (v_p and v_s) of SiC-diamond composite under hydrostatic pressure were measured simultaneously in a multi-anvil apparatus, and the relationship between modulus and pressure was also obtained.v_p and v_s increase with increasing pressure in the pressure range o...

The origin, ignition and growth of hot spot are keys to understand the shock initiation in heterogeneous explosive.An experimental method of shock behavior for millimeter-scale plastic-bonded explosives (PBX) is developed by using an electrical explosion driven low-velocity flyer, a quick-response t...

Traditional two-dimensional (2D) metallographic modeling method is commonly used to evaluate the spatial void distribution in shocked metals.However, its error was not quantified.This paper reports the comparison of 2D method and three-dimensional (3D) high resolution X-ray tomography method on eval...

The equation groups of one dimensional magnetohydrodynamics code SSS/MHD are given, and a calculation model of magnetically driven isentropic compression on a side-step aluminum sample is established.Based on the calculated values of current and particle velocity at the back interface of sample, acc...

In the directional blasting in various engineering area and the numerical simulation of detonation, it is sometimes necessary to estimate the initiation time from the initiation position to a specific point of the explosive.Based on the Huygens' principle, the advancing front technique is introduced...

The fragmentation and penetration of the 40Cr steel cylindrical shells preformed by local quenching technology were studied experimentally.Through scanning electron microscopy (SEM) analysis, it is found that the microstructure of hardened layer in the cylindrical shell is predominantly needle and l...

This paper presents brief results of an experimental investigation on deformation shapes of cylindrical shell filled with soil subjected to lateral explosion loading, and the ultimate deformation shapes are obtained.Based on the experimental results, a corresponding analytical model is undertaken by...

For the purpose of understanding the law of coal mine gas explosion, gas explosion characteristics under different ambient humidity conditions were experimentally determined, and the inhibition of water vapor on gas explosion is analyzed.The results show that when the premixed gas varies from dry st...

The growth theory of natural diamonds and the development history of synthetic diamonds were introduced.The preparation methods of synthetic diamond were discussed from 3 aspects of static-pressure, impact-pressure and low-pressure methods.The ultra-high pressure technologies of synthetic diamonds w...