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(no pressure was used during shaping step) and atmospheric pressure sintering with low-melting point glass (LPG) powder as the binding material to facilitate the transformation of spodumene flotation tailings... properties of ceramic materials. Overall, SFTs were successfully sintered at low temperature to prepare ceramic materials with good mechanical properties, which are crucial for energy conservation......
,较低的纳米黏土浓度对微裂纹密度的减少效果相对不明显,而较高的纳米黏土浓度会表现出传统的填料效应. 图9 经过两次常 -低温循环测试后不同复合材料层合板内部微裂纹形貌[30] Fig. 9 Morphologies of microcracks in different composite laminates after two normal-low...空材料学报, 2015, 35(1): 59-65. CHEN Qi, GUAN Zhi-dong, HE Wei, et al. Leakage performances of composite laminate structure subjected to low-velocity impact[J]. Journal of Aeronautical Materials, 2015, 35......
axial-piston pump/motor designed in this study. We selected the main parameters that affect the working conditions of the external-return mechanism as n=1500 r/min (low calibration speed), n=2500 r/min (medium speed), n=3500 r/min (high speed), bf=0.00269 m (low calibration-offset distance), bf=0.00300 m (medium offset distance), bf=0.00319 m (high offset distance), external swash plate inclination β......
heat transfer purposes, it is necessary to use working fluids with very low boiling temperature [83–85]; while for high-temperature applications such as solar thermal collectors, concentrated solar... transfer coefficient can be increased up to 20% by using the nanofluid, compared to base fluid [151]. BUSCHMANN et al [152] investigated a thermosyphon with gold/water and titanium oxide/ water......
for aqueous gelcasting alloy Ni-362-3 STAMPFL等[65]将MoldSDM(Mold shape deposition manufacturing)模具制造工艺与凝胶注模成型技术相结合,在快速分层制备的腊模内通过浇注高固相体积分数的金属粉末料浆,成功制备出形状复杂的不锈钢叶轮,烧结后该叶轮的微观结构及力学性能优良,可与传统粉末冶金工艺制件媲美.图...): 407?413. [11] JANNEY M A, OMATETE O O, WALLS C A, NUNN S D, OGLE R J, WESTMORELAND G. Development of low-toxicity gelcasting systems[J]. Journal of the American Ceramic Society, 1998, 81(3): 581?591......
(defined as the range between the higher thermal resistances associated to low heat fluxes and resulting from the low boiling rates, and the higher thermal resistances associated to high heat fluxes... presented in Ref. [52] consists of a wrapped screen mesh, made of single-plaited stainless steel. Stainless steel is a steel alloy composed of iron and different proportions of chromium, which is responsible......
; (3) As the generated sulfuric acid contaminates groundwater, the pH of the groundwater can be reduced to as low as 2 [6]. In such acidic... to the following two effects: 1) the pozzolanic reaction between CH and silica fume, consuming CH. CH was considered as the main component that leads to the low acid resistance of cementitious material [18......
and efficient alternative to alloy carriers in chemical looping processes[J]. AIChE Journal, 2017, 63(1): 51-59. [102] NEAL L, SHAFIEFARHOOD A, LI F. Effect of core and shell compositions......
炼铁技术新发展 2004年,来自欧洲15个国家的48个企业,组织联合启动了ULCOS(Ultra-low CO2 Steelmaking)项目,并提出了基于氢冶金的钢铁冶金路线,通过电解水产氢,供给直接还原竖炉,工艺路线如图4所示[45].该项目氢冶金技术的突破,可使钢铁冶炼碳排放从1850 kgCO2/t粗钢降低84%至300 kgCO2/t粗钢[45]. 2008年,日本启动了创新性炼铁工艺技... reduction[J]. ISIJ International, 2000, 40(10): 935-942. [22] COSTA A R, WAGNER D, PATISSON F. Modelling a new, low CO2 emissions, hydrogen steelmaking process[J]. Journal of Cleaner Production, 2013......
excessive cutter wear, low advance rates to early immature TBM terminations. Table 1 TBM projects with exceedingly hard and abrasive rock problems Appreciating the problems with hard and abrasive rocks... to TBMs, leading to high/abnormal cutter wear, possible cutter wipeout and cutterhead jamming, conveyor and mucking chute damage, gripping and support difficulties, and consequently a low utilization......
