http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 배원태(W. T. Bae) (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
$Al_2O_3-ZrO_2$ 복합체의 강도 및 열충격 저항의 향상에 관한 연구
황규홍,배원태,최명덕,오기동,김경운,김환,Hwang, K.H.,Bae, W.T.,Choi, M.D.,Oh, K.D.,Kim, K.U.,Kim, H. 한국세라믹학회 1988 한국세라믹학회지 Vol.25 No.3
$Y_2O_3$가 $thickapprox$1mol.% 고용된 정방정 지르코니아를 알루미나에 20vol.% 섞어 체조립에 의해 과립으로 만든 다음 여기에 알루미나에 단사정 지르코니아를 10 ~30 vol.%섞어 만든 과립을 15~30vol.%가 되도록 과립형태로 분산시켜 성형 및 소결함으로써 단사정 및 정방정 지르코니아의 분산영역이 서로 다른 불균질 조직의 $Al_2O_3-ZrO_2$복합체를 제조하여 강도 및 열충격 거동을 관찰하였다. 이러한 불균질 조직의 $Al_2O_3-ZrO_2$ 복합체는 분산 agglomerate 내의 낮은 소결밀도에 의한 기공의 존재, 단사정상에 의한 미세균열, 또 이에 따른 주위에의 압축응력 등이 복합적으로 작용하여 향상된 열충격 거동을 보여 주었다. The strength and thermal shock resistance of $Al_2O_3-ZrO_2$ composites have been studied. The tetragonal $ZrO_2$ powder containing 1 mol.% $Y_2O_3$ and monoclinic $ZrO_2$ powder were prepared by coprecipitation method and subsequently mixed with $Al_2O_3$ powder and granulated by sieving. Duplex composites were prepared by dry mixing matrix agglomerate with 15 to 30 vol.% of dispersion agglomerate, followed by pressing and sintering at 1$600^{\circ}C$ for1 hr. These $Al_2O_3-ZrO_2$ 2 composites having heterogeneous structure showed improved thermal shock behaviors because of the microcracking and pores in dispersed granules, and compressive stresses around dispersed granules resulting from $ZrO_2$ transformation.
-
황규홍,배원태,조명제,연상흠,정두화 경상대학교 생산기술연구소 2003 工學硏究院論文集 Vol.19 No.-
For improving the oxidation resistance of pitch carbon, anti-oxidant and graphite were incorporated with fused pitch and followed by palletizing by cooling and pulverizing. Oxidation resistances were evaluated by DTA-TG, weight loss in crucibles and in MgO castables. By increasing the softening point of pitch, the oxidation resistance could be increased. But due to relatively small increase it was not preferable to refractories. And by adding anti-oxidant powders such as Al and/or B_(4)C the oxidation resistances of pitch carbons could be increased than the increasement of softening point. But the oxidation resistance of pitch carbons could not exceed that of natural graphite. So in order to utilizing graphite which have high oxidation resistance but poor water resistance, graphite was impregnated in pitch and pulverized to pellet. Graphite containing pitch, especially containing Al and/or B_(4)C also in pitch, was excellent in oxidation resistance among all type of pitch. Finally pitch and graphite containing pitchs were incorporated in MgO castables by using surfactant and defloculant very well and shows very high oxidation and moisture resistances to utilizing MgO-C castables.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
