서지주요정보
반응소결된 $Al_2O_3-ZrO_2-Nb$ 복합체의 미세구조와 기계적 성질 = Microstructure and mechanical properties of $Al_2O_3-ZrO_2-Nb$ composite prepared by reaction sintering
서명 / 저자 반응소결된 $Al_2O_3-ZrO_2-Nb$ 복합체의 미세구조와 기계적 성질 = Microstructure and mechanical properties of $Al_2O_3-ZrO_2-Nb$ composite prepared by reaction sintering / 이수민.
저자명 이수민 ; Lee, Soo-Min
발행사항 [대전 : 한국과학기술원, 1990].
Online Access 제한공개(로그인 후 원문보기 가능)원문

소장정보

등록번호

8001371

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 9024

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Reaction sintering of $Al_{2}-O_{3}-ZrO_{2}_Nb$ composite has been investigated using $Al_{2}O_{3}$,$Nb_{2}O_{5}$ and $ZrAl_{2}$ powders. During sintering, a reaction between $Nb_{2}O_{5}$ and $ZrAl_{2}$ occurs and results in the formation of $ZrO_{2}$ and Nb in alumina matrix. Two series of specimens, $78.32Al_{2}O_{3}-14.02Nb_{2}O_{5}-7.66ZrAl_{2}$ in wt% (AZN-5), and $72.34Al_{2}O_{3}-13.76Nb_{2}O_{5}-7.52ZrAl_{2}-6.38ZrO_{2}(AZN-10)$,have been prepared. After the reaction, AZN-5 specimen contains 5vol% $ZrO_2$ and 4.99vol% Nb, and AZN-10 specimen 10vol% $ZrO_2$ and 4.99vol% Nb. Powder compacts have been sintered at various temperatures between 1600 and 1700℃ for 30min in Ar. DTA and X-ray analysis have shown that the reaction started at 1490℃. Sintered density increases with sintering temperature. AZN-10 specimen shows highter density than AZN-5 specimen for almost all the experimental conditions. Hot pressed and reaction sintered $Al_2-O_3-ZrO_2-Nb$ show higher toughness and lower hardness than hot pressed $Al_2-O_3-ZrO_2$. The toughness difference increases with $ZrO_2$ content. During the toughness measurement by the indentation method, the crack propagates through many metallic Nb particles which show ductile deformation. The increase in toughness of $Al_2-O_3-ZrO_2-Nb$ over $Al_2-O_3-ZrO_2$ is believed to result from the absorption of crack propagation energy by the plastic deformation of Nb particles.

서지기타정보

서지기타정보
청구기호 {MMS 9024
형태사항 iii, 55 p. : 삽도, 사진 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Soo-Min Lee
지도교수의 한글표기 : 강석중
지도교수의 영문표기 : Suk-Joong L. Kang
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 53-55
주제 Composite materials.
Metals --Mechanical properties.
Microstructure.
Sintering.
복합 재료. --과학기술용어시소러스
기계적 성질. --과학기술용어시소러스
미세 구조. --과학기술용어시소러스
반응 소결. --과학기술용어시소러스
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