Machinability of Ti₃SiC₂ with layered structure synthesized by hot pressing mixture of TiC_x and Si powder

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• 作者：SungSic Hwang^a ; Sang Chul Lee^a ; JaeHo Han^b ; ^d ; Dongyun Lee^c ; ^{dlee@pusan.ac.kr} ; Sang-Whan Park^b ; ^{spark@kist.re.kr}
• 关键词：Hot pressing ; Grain size ; X-ray methods ; Mechanical properties ; Machinability
• 刊名：Journal of the European Ceramic Society
• 出版年：2012
• 期刊代码：53_09552219
• 类别：ms
• 出版时间：September, 2012
• 卷：32
• 期：12
• 页码：3493-3500
• 文件大小：2805 K

摘要

Nanolaminate Ti₃SiC₂ was synthesized from a mixture of TiC_x (x = 0.67)/Si powder by hot pressing to increase machinability. Ti₃SiC₂ was synthesized at temperatures of 1360 掳C and 1420 掳C for 90 min under a pressure of 25 MPa. The X-ray diffraction results showed that while mainly Ti₃SiC₂ with some unreacted TiC_x were detected in the synthesized samples at 1360 掳C, no phases except Ti₃SiC₂ phases remained in the synthesized samples at 1420 掳C. The cutting resistance of Ti₃SiC₂ was measured in terms of the principle, feed, and thrust forces and was compared with that of middle-carbon steel, SM45C. The values of the principal force of the synthesized Ti₃SiC₂ were lower than those of SM45C. After machining, the roughness of the Ti₃SiC₂ was lower than those of SM45C; however, the damage to the tool bit used for the machining of SM45C was less than the damage to those used for the machining of the Ti₃SiC₂.