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 : James F. Shackelford (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Wet Foam Stability from Colloidal Suspension to Porous Ceramics: A Review
Kim, Ik Jin,Park, Jung Gyu,Han, Young Han,Kim, Suk Young,Shackelford, James F. The Korean Ceramic Society 2019 한국세라믹학회지 Vol.56 No.3
Porous ceramics are promising materials for a number of functional and structural applications that include thermal insulation, filters, bio-scaffolds for tissue engineering, and preforms for composite fabrication. These applications take advantage of the special characteristics of porous ceramics, such as low thermal mass, low thermal conductivity, high surface area, controlled permeability, and low density. In this review, we emphasize the direct foaming method, a simple and versatile approach that allows the fabrication of porous ceramics with tailored microstructure, along with distinctive properties. The wet foam stability is achieved under the controlled addition of amphiphiles to the colloidal suspension, which induce in situ hydrophobization, allowing the wet foam to resist coarsening and Ostwald ripening upon drying and sintering. Different components, like contact angle, adsorption free energy, air content, bubble size, and Laplace pressure, play vital roles in the stabilization of the particle stabilized wet foam to the porous ceramics. The mechanical behavior of the load-displacements curves of sintered samples was investigated using Herzian indentations testes. From the collected results, we found that microporous structures with pore sizes from 30 ㎛ to 570 ㎛ and the porosity within the range from 70% to 85%.
-
Synthesis of AlON powders through a polymerization template approach by spark plasma sintering
Zhihui Ding,Wemshi Zheng,Fei Chen,Ik Jin Kim,Wulong Liu,James F. Shackelford,Hyoung-Won Son,Tadachika Nakayama,Sukyoung Kim,Young-Hwan Han,Jooseong Kim 한양대학교 청정에너지연구소 2023 Journal of Ceramic Processing Research Vol.24 No.4
As a new wet chemical method, polymer template strategy uses monomer polymerization to form a continuous carbonnetwork. The carbon skeleton can make the carbothermal reduction reaction take place in the original, thus preventing theexcessive agglomeration of grains. The Al2O3 / C ceramic precursor were obtained by polymer template strategy, and thenAlON powders with 3 μm size were synthesized through a spark plasma sintering (SPS) method at 1,650 °C. We confirmedthat a continuous network of carbon chains was formed by polymerization to encapsulate the alumina powder, so as to reducethe contact growth of the grains during the high-temperature carbothermal reaction. We established that, when the mass ratioof carbon source to alumina was 1.6:10, the pure AlON powder could be prepared by calcining at 1,650 °C for 20 min in aflowing nitrogen atmosphere.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
