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【期刊论文】Preparing TiNi Porous Alloys by SHS Process
郭志猛, Cunjing CHEN, Zhimeng GUO, Chengchang JIA, Sheng YIN
,-0001,():
-1年11月30日
TiNi porous alloys were prepared as artificial bone by Self-propagation High-temperature Synthesis (SHS) in order to develop new bio-materials. The mixture of titanium and nickel powder was ignited under the atmosphere of argon gas. TiNi porous alloys with different microstructure were obtained by various ignition models such as preheating and heat explosion. SEM and XRD were used to analyses pore characteristics and phase structures of samples. The results show that SHS is a useful method to prepare TiNi porous alloys.
SHS,, TiNi porous alloys,, Open porosity
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【期刊论文】Immobilization of Radioactive Wastes into Perovskite Synrock by the SHS Method
郭志猛, Ruizhu Zhang , a, Zhimeng Guo , Chengchang Jia, Guangfeng Lu
,-0001,():
-1年11月30日
This paper researched the fabrication of perovskite synrock by self-propagating high temperature synthesis (SHS) and the characterization of the products. This synthesis process is simpler, the fabricated synrock can immobilize waste loading up to 35wt% SrO with satisfied physical properties (density>4.2g•cm-3, open porosity<0.2%, Leach rate<0.1g•m-2•d-1). The structure analyses by XRD and SEM/EDS show that the major phase is perovskite which well agrees with the design. It proves that SHS offer a suitable Sr-waste synroc which is favorable for geological disposal.
mineral-like ceramics; perovskite synrock; dioactive waste(RAW); immobilization,
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【期刊论文】SrTiO3-Immobilization of Simulated HLW By SHS
郭志猛, Ruizhu Zhang ), )*, Zhimeng Guo), Chengchang Jia), Hua Zhang)
,-0001,():
-1年11月30日
Using chromium oxide (CrO3) as an oxidant, amples based Strontium Titanate (SrTiO3) synroc and model high-level wastes (Sr2+) were fabricated by the SHS-densification and tested. Sr2+ directly took part in the synthesis process. As a result, immobilization limitation issue is basically resolved. The results of PCT, XRD and SEM/EDS analysis show that the Strontium Titanate is high density, low leach rate and high property stability and the synthesis process is feasible in technology and economy. It is a durable material with high-level waste loading and is in favor for final geological disposal.
Strontium Titanate,, high-level waste(, HLW), ,, immobilization,, self-propagating high-temperatures synthesis(, SHS),
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【期刊论文】Synthesis of nanosized tungsten powder
郭志猛, Guangfeng Lu, Zhimeng Guo, Ji Luo, Liying Zhang
,-0001,():
-1年11月30日
Nanosized tungsten powder was synthesized by means of different methods and conditions with nanosized WO3 powder; the powder and the intermediate products were characterized using XRD, SEM, TEM, B.E.T and SAXS(X-ray diffracto-spectrometer/Kratky small angle scattering goniometer). It has been shown that nanosized WO3 can be completely reduced to WO2 at 600℃ after 40min, and WO2 can be reduced to W at 700℃ after 90min, moreover, the mean size of W particles is less than 40nm. Furthermore, the process of WO3→WO2→W excelled that of WO3→W in getting stably nanosized tungsten powder with less grain size.
Nano-tungsten powders, Reduce, SAXS
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【期刊论文】Combustion Characteristics of Aluminium-Iron Oxide in SHS-Gravitational Process
郭志猛, Tao Lin, Shiju Guo, Sheng Yin, Zhimeng Guo
,-0001,():
-1年11月30日
The ceramic lined fine pipe, elbow and tapered pipe can be prepared by SHS-gravitational process. In order to get high quality of products, the combustion of aluminium-iron oxide thermite in this process must be under control. The effects of thermite filling density, hole in thermite and inclined angle of pipe on combustion rate were studied to direct to the controlling factor. It shows that the combustion rate decreases with the decrease of filling density. The thermite combusts downwards the pipe much more quickly if there are holes in the thermite. And the combustion rate increases with the increase of the inclined angle of pipe. The experiment results direct to the conclusion that the combustion of thermite is predominantly controlled by gas phase reaction, which appears due to the high temperature of the thermite combustion.
thermite reaction, SHS, chemical synthesis, composites
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