Abstract

Electrical discharge machining (EDM) was attempted on a ceramic matrix composite containing non-conductive alumina as a matrix and conductive titania as a second phase, and was found successful. As the current or duty factor increased, the material removal rate (MRR) increased and the surface roughness also increased. The EDMed surface was covered with a number of craters of a circular shape having 100-200 microns of diameter. The melting and evaporation was suggested for the EDM mechanism. The bending strength decreased 44% after EDM, but the Weibull modulus increased more than twice. Combination of EDM and barre이 polishing resulted in the maintenance of the bending strength level. Temperature distribution near a spark in the sample was computer-simulated by use of finite element method, and was found to have similar shape to the one which the observed craters have.

주제어

#Electrical discharge machining   #Ceramic matric composites   #Material removal rate   #Bending strength   #Weibull modulus  

저자의 다른 논문

참고문헌 (16)

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이 논문을 인용한 문헌 (1)

1. Bang, Hwan-Cheol ; Yun, Jon-Do 2000. "Fabrication of Various Carbides with Fibrous and Particulate Shapes by Self-Propagating High Temperature Synthesis Method" 한국재료학회지 = Korean journal of materials research, 10(5): 343~349  원문보기 상세보기