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;Effect of silver contents on MiCs The performance of titanium dioxide/silver sulfate is contrasted to that of silicon dioxide/silver sulfate which has no photocatalysis effect. The optimal silver content... to that of silicon dioxide/silver sulfate when silver contents are less than 2%. It is due to the fact that photocatalysis of titanium dioxide and silver ions cooperate to kill bacilli at lower silver......
an important role for improving the morphosis of eutectic silicon particles in ZL108 alloy. It is believed reasonably that titanium addition should play a supplementary role for strengthening the effects of strontium modification[12]. It can be seen in Table 6 that the average diameter, area and slenderness ratio of eutectic silicon particles are decreased with titanium addition, but the circularity......
无污染的优良特性. 关键词:氧化钙；钛合金；精密铸造；陶瓷型芯；烧结模型 中图分类号:TG146.2,TG249.5 文献标志码:A Initial-sintering stage properties of calcium oxide ceramic cores during titanium alloy precision casting... properties and internal precision. The calcium oxide has an excellent chemical inertness to the melting titanium and the cores can be easily removed after casting. The CaO ceramic cores’ thermodynamic......
on carbothermal preparation of titanium carbide from different gel precurous [J]. Journal of the European Ceramic Society, 1999, 19(2): 195-206. [9] ZHU Xin-kun, ZHAO Kun-yu, CHENG Bao-chang, LIN Qiu-shi, ZHANG... of titanium carbide from carbon-coated titania powder [J]. Journal of the European Ceramic Society, 1997, 17(11): 1309-1315. [18] OUENSANGA A. Thermodynamic study of the Ti-C-O system in the temperature......
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一种具有稳定富碳表层的SiC纤维的制备与性能 毛仙鹤1,王得印1,宋永才1,王应德1 (1.国防科技大学,新型陶瓷纤维及复合材料重点实验室,长沙,410073) 摘要:采用不饱和烃不熔化处理后的聚碳硅烷(PCS)纤维经高温烧成可制得一种新型的SiC纤维,纤维的抗张强度达2.5~2.8GPa,氧含量4wt%~6wt%,电阻率仅为0.5Ω·cm左右,大大低于采用传统空气不熔化方法得到的SiC纤维.研究表明:该纤维表面存在厚度约50nm的富碳层,并且在Ar气中进行高温热处理后,表面富碳层结构无明显变化.与日本通用级SiC纤维Nicalon NL202 相比,纤维的耐热性提高200~300℃.纤维具有低电阻率稳定性,从室温到1600℃,其电阻率始终保持在0.4~0.8Ω·cm. 关键词:SiC纤维; 富碳; 电阻率; silicon carbide fiber; excess......
Effect of Graphene Nanoplate and Silicon Carbide Nanoparticle Reinforcement on Mechanical and Tribological Properties of Spark Plasma Sintered Magnesium Matrix CompositesAniruddha Das,Sandip... reinforced with low reinforcement content(up to 4-5 vol.%)of graphene nanoplates(GNPs) and silicon carbide(SiC) nanoparticles using ball milling and spark plasma sintering(SPS) is reported. Near full......
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Research on toughening mechanisms of alumina matrix ceramic composite materials improved by rare earth additive ZHANG Jianhua1,LIU Changxia2,ZHANG Xihua3,LI Musen3 (1.School of Mechanical...) Abstract:Mixed rare earth elements were incorporated into alumina ceramic materials. Hot-pressing was used to fabricate alumina matrix composites in nitrogen atmosphere protection. Microstructures......
by the in situ reaction between titanium and silicon carbide powders at 1473 K and evaluated the tribological behavior. SHEIBANI and NAJAFABADI [32] assessed the possibility to produce Al/TiC AMCs...; titanium carbide; electron backscatter diffraction; casting; microstructure; mechanical properties 1 Introduction Aluminium metal matrix composites (AMCs) were developed out of the continuous requirement......
