서지주요정보
질화규소계 전기전도성 복합재료의 물성 및 방전가공 에 관한 연구 = A study on the properties and electrical dischage machining of $Si_3N_4$based electro-conductive ceramic composites
서명 / 저자 질화규소계 전기전도성 복합재료의 물성 및 방전가공 에 관한 연구 = A study on the properties and electrical dischage machining of $Si_3N_4$based electro-conductive ceramic composites / 이기성.
저자명 이기성 ; Lee, Kee-Sung
발행사항 [대전 : 한국과학기술원, 1991].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8002048

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 9123

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

$Si_3N_4$-based electro-conductive composites were fabricated by hot pressing under the condition of 1750℃, 35MPa for 1 hr. In these composites 20 vol% SiC whisker as a reinforcing material, variable content of TiN(up to 30 vol%) as a conducting particle, and 5wt% MgO as a sintering additive were added to the $Si_3N_4$ matrix. Thereafter the electrical and mechanical properties were tested. In addition, electrical discharge machining experiment has been done by using die-sinking electrical discharge machine. The relative densities were more than 95% of TD up to 30vol% TiN in spite of slight decreasing with TiN addition. Then microstructures were homogeneous in consequence of sedimentation treatment for $Si_3N_4$ powders and SiC whiskers. According to X-ray analysis there were not crystalline phases by the reaction of starting materials. In the mechanical properties, flexural strength and Vickers hardness was slightly decreased with the addition of TiN up to 30 vol%, but fracture toughness was not changed. Electrical conductivity was increased with TiN. Specially, SiC whisker added to improve fracture toughness contributed greatly to the conductivity. By the test of electrical discharge machining, EDM was impossible for $Si_3N_4$-20vol% SiCw material but possible by addition of 10vol% TiN. In addition, machining rate increased with TiN addition. EDM can produce a better surface finish and the reaction product was not found. The maximum machining rate was 2.04㎣/min.

서지기타정보

서지기타정보
청구기호 {MMS 9123
형태사항 iii, 65 p. ; 삽도 : 26 cm.
언어 한국어
일반주기 저자명의 영문표기 : Kee-Sung Lee
지도교수의 한글표기 : 김종희
지도교수의 영문표기 : Chong-Hee Kim
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 60-65
주제 Composite materials.
Electric engineering.
Metals --Mechanical properties.
복합 재료. --과학기술용어시소러스
방전 가공. --과학기술용어시소러스
전기적 성질. --과학기술용어시소러스
질화규소.
QR CODE qr code