A computer-aided design program for explosive welding parameter was developed. Using Visual C⁺⁺, it is convenient to import and export data by menu as well as visual operations. In comparison with the result of explosive welding test, it was shown that the optimum value of the parameter calculated with the CAD program was in agreement with the experimental result exactly. Using the CAD proposed here, it will be useful to both select the optimum parameter for explosive welding and reduce trial-and-error.

Based on the theoretical analysis of the interaction between diamond and melted cobalt under HP/HT conditions, the effect of temperature and carbon content of the melted cobalt on the sintering process of diamond dissolution and polycrystalline diamond growth are discussed. It is suggested that the diamond is preferable to graphite to dissolve in the melted cobalt under HP/HT and there are three sintering mechanisms in the diamond-cobalt sintering system, that is, the mechanism of diamond rearrangement, dissolution and precipitation and formation of the direct bonding of diamond to diamond. The melted cobalt with different carbon content and temperature can play an important role to weak or cease the covalent bond of diamond at its surfaces, to promote the rearrangement of diamond, to realize the transportation of diamond atoms and finally to form the diamond to diamond bonding structure of polycrystalline diamond. According to the high pressure liquid sintering theory of diamond proposed in this paper, some experimental phenomena found during the HP/HT sintering process of polycrystalline diamond compacts could be explained rationally.

For two kinds of homemade PVDF piezofilm, the shock loading stress-charge curves were calibrated, using light gas gun and shock tube respectively. Results were compared with some other homemade and overseas' PVDF. By measuring the particle velocity in the step-release experiment, the shock release behavior of PVDF was also studied. The hystersis of PVDF was found obviously.

An accurate first-principle density-functional method was used to calculate the twenty borides after their volume were compressed. The electronic structures were compared to each other and their dependence on cell volumes was made clearly. These results may be helpful to modulate physical properties of the borides under pressure.

The results of factorial experiment showed that the significant external factors affecting UHHP sterilization were pressure, temperature and pressure holding time. Based on the results, response surface methodology (RSM) was employed and a second order quadratic equation for UHHP sterilization was built in the present work. The applicability of the model equation for predicting the optimum response values was verified effectively by the validation data. By analyzing the response surface plots and their corresponding contour plots as well as solving the quadratic equation, the optimum process parameters for sterilization Staphyloccus aureus of six log cycles were obtained as: temperature 34.35 ℃, pressure 329.84 MPa, and pressure holding time15.53 min.

Array MnCu film piezoresistance gauges were fabricated by D. C. magnetism sputtering with 99% Al₂O₃ taken as substrate and insulator. Four MnCu gauges with the same resistance were deposited on one Al₂O₃ substrate symmetrically. Through dynamic loading experiments at the pressure of 51.72 GPa, it is indicated that four piezoresistance gauges have good consistency, and keep insulating trait under high pressure, which verifies the reliability of dynamic testing of MnCu film piezoresistance gauges.

Rusting with water, but removing with water too. Ultra-high pressure waterjet with pressure 200~250 MPa has been used to remove rust automatically and to prevent from re-rusted in a series of testing research. This paper describes the creation of a new assemblied ultra-high pressure waterjet rust removal set-up and its working principle in every step, including jet formation, flow-yard model and working efficiency.

In this paper, a slanting impaction model of two parallel plates was proposed to research the effect of friction between particles during explosive consolidation of powder. The change tendence of the interface friction of the particles with the change of temperature was analyzed, and influence of shock compression, grain size of powders and intensity of material on the time for the holes compaction was researched by LS-DYNA program. A formula to calculate the temperature rise at interface caused by adiabatic friction is given. The result shows that the temperature rise is related to factors of material's characteristics, size of particles, angle of shock-direction and shock compression and so on. The temperature rise decreases with the increase of ability of heat deposit and transfer, and the intensity of material's. It increases as the porosity of material, size of diameter or shock pressure increases. The temperature at the interface can be higher than melting point of the material if the grain diameter and compact force are appropriate.

According to observation results of explosive dispersion process of FAE (fuel-air explosive) test device with fast kinematics analysis system, the different dispersion stages of fuel were characterized and the influence of specific central explosive, ratio of height to diameter and shell material to fuel dispersion was studied in this paper. The results show that dispersion process can be divided into the following three phases, jet formation and expansion movement phase, two-direction expansion movement phase and gas-liquid amalgamation movement phase. The different stages of fuel dispersion process correspond with different hydrodynamics characteristics and contribute to the formation of cloud in respective. Under the conditions of general optimization of test device, cloud area and volume were expanded by properly increasing specific central explosive. The ratio of height to diameter was not a remarkable factor influencing cloud status, but larger ratio of height to diameter dispersed fuel better. Cloud dispersion of steel shell was better than that of aluminum shell. It is concluded that ideal detonation status of cloud and high power effect can be attained when the steel shell, specific central explosive about 3% and ratio of height to diameter between 3 and 5 are adopted and are well-matched of three device parameters above.

Based on the Einstein model, the universal equation of state for solids proposed by Vinet et al. is extended to include the thermal effect. Employing the nearest neighbor generalized Lennard-Jones potential to describe the effective interaction between the ions, the lattice part of potential energy per atom is expanded as quadratic function of displacement of ion to derive the Einstein temperature and Debye-Grüneisen parameter as a function of the volume. The theory contains four potential parameters except for the three parameters in the Vinet EOS, but only five of them are independent, and as the temperature being higher than the Debye temperature, the number of independent parameter can be further reduced to four. The theory is applied for 23 metallic solids, to predict Debye-Grüneisen parameters and compressibility coefficients at chamber temperature. The predicted results are in good agreement with the experimental data. The predicted variation of compressibility and thermal expansivity coefficients with temperature for gold, copper, xenon and sodium chloride also are in good agreement with the experimental data.