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高温增韧
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     EFFECT OF THE SiC_W ON THE TOUGHENING BEHAVIOR OF TiB_2 / 25SiC_W CERAMIC COMPOSITE AT ELEVATED TEMPERATURE
     SiC_W对TiB_2/25SiC_W陶瓷材料高温增韧效果的影响
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     Al2O3/TiB2/SiCw ceramic composites with different SiC. content were fabricated by hot-pressing technique. The mechanical properties at high temperature of these composites were studied.
     采用热压法制备了不同SiC晶须含量的Al2O3/TiB2/SiCw复合材料.研究了该复合材料的强度、断裂韧性随温度的变化规律.结果表明:添加SiC、有利于提高材料的高温韧性和高温强度.晶须含量越高,高温增韧效果越明显.
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  相似匹配句对
     Study on Toughening of Heat-resistant Epoxy Resin
     耐高温环氧树脂增韧体系的研究
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     In order to decrease its brittleness, many toughening methods are adopted, besides the advanced manufacturing technology.
     纳米技术增韧 ;
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     hyperthermia
     高温技术
短句来源
     Toughening Piezoelectric Ceramics
     压电陶瓷的增韧
短句来源
     Study on CRBN Used as Toughening Agent for Epoxy Resin Heat-resist Adhesive
     无规羧基丁腈增韧环氧树脂耐高温粘合剂的研究
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  high temperature toughness
Mixed-mode high temperature toughness of silicon nitride
      


The fracture behaviour at high temperature of Al_2O_3/TiB_2/SiC_w composites with different SiC_w contents was studied. Considerable improvement in fracture toughness was observed at high temperature. The more the SiC whiskers contained, the higher the fracture toughness improved. Results also indicate that the number of SiC_w pulled out is much more increased as the temperature increases. At room temperature, when the SiC_w aspect ratio is less than 2. 87, only whiskers can be pulled out for the composite with...

The fracture behaviour at high temperature of Al_2O_3/TiB_2/SiC_w composites with different SiC_w contents was studied. Considerable improvement in fracture toughness was observed at high temperature. The more the SiC whiskers contained, the higher the fracture toughness improved. Results also indicate that the number of SiC_w pulled out is much more increased as the temperature increases. At room temperature, when the SiC_w aspect ratio is less than 2. 87, only whiskers can be pulled out for the composite with 20% (vol) SiC_w. But at 900℃, pull out can be achieved for the whiskers whose aspect ratio is less than 10. The toughening effect at high temperature is much more improved as the SiC_w content is increased.

研究了不同SiC晶须含量的Al_2O_3/TiB_2/SiC_w陶瓷刀具材料的断裂韧性随温度的变化规律。结果表明:Al_2O_3/TiB_2/SiC_w陶瓷材料的K_(Ic)在1000℃内随温度的升高而增大;晶须含量越高,K_(Ic)增幅越大。通过计算分析表明:随温度的升高断裂时拔出的晶须大大增多。当晶须体积含量(下同)为20%时,Al_2O_3/TiB_2/SiC_w陶瓷在室温时只有长径比小于2.87的晶须在断裂时才有可能产生拔出,而在900℃时长径比小于10的晶须都能产生拔出。在同样温度条件下,晶须含量越高所能产生拔出的晶须增多。当晶须含量为40%时(晶须长径比为10),在温度大于620℃时能产生晶须的拔出。而当晶须含量为18%时,只有温度大于940℃才能产生拔出。晶须含量越高其高温增韧效果越强。

Al2O3/TiB2/SiCw ceramic composites with different SiC. content were fabricated by hot-pressing technique. The mechanical properties at high temperature of these composites were studied. Considerable improvement in fracture toughness was observed at high temperature. The more the SiC. were contained, the higher the toughening and strengthening effect were obtained.

采用热压法制备了不同SiC晶须含量的Al2O3/TiB2/SiCw复合材料.研究了该复合材料的强度、断裂韧性随温度的变化规律.结果表明:添加SiC、有利于提高材料的高温韧性和高温强度.晶须含量越高,高温增韧效果越明显.

 
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