Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Yigal D. Blum"'
Publikováno v:
Advanced Engineering Materials. 16:814-819
A new approach for forming aerogels with various silicon-based compositions and hybrids between ceramics and carbon has been developed by combining efficient hydrosilylation as the hybridization-crosslinking approach associated with gelation in the p
Publikováno v:
Journal of the American Ceramic Society. 96:2785-2792
Silicon oxycarbides with controlled porosity in the mesopore range have been obtained through high-temperature pyrolysis of newly developed reactive siloxane formulations. The starting gels have been synthesized via Pt catalyzed hydrosilylation react
Publikováno v:
Journal of the American Ceramic Society. 91:1453-1460
A new process to form thick and dense ultra-high-temperature ceramic (UHTC) composite coatings over SiC surfaces is described. Coatings of ZrB 2 /SiC/(ZrC) thicker than 100 μm are formed by a reaction-bonded SiC (RBSC) approach based on Si infiltrat
Publikováno v:
Journal of the American Ceramic Society. 91:1481-1488
The homogeneous and heterogeneous reactions of hafnium (Hf) with boron (B) or carbon (C) powders were studied under non-self-propagating high-temperature synthesis (SHS) conditions in searching for chemically aided processes of ultra-high-temperature
Autor:
Hans-Joachim Kleebe, Yigal D. Blum
Publikováno v:
Journal of the European Ceramic Society. 28:1037-1042
The correlation between microstructure evolution and increasing processing temperature of a polymer-derived SiOC ceramic with a high volume fraction of free carbon was studied by transmission electron microscopy (TEM). The high carbon content of the
Publikováno v:
Chinese Physics Letters. 25:234-237
Different from usual glancing-angle deposition where low surface diffusion is necessary to form nanorods, strong surface diffusion mediated glancing-angle deposition is exemplified by growing tin nanorod films on both silicon and glass substrates sim
Autor:
Lucille A. Giannuzzi, Yongsoon Shin, Yigal D. Blum, S. M. Schwarz, Charles H. Henager, B. W. Kempshall
Publikováno v:
Journal of Nuclear Materials. :1139-1143
Coatings and joining materials for SiC and SiC-based composites for nuclear energy systems are being developed using preceramic polymers filled with reactive and inert powders, and using solid-state reactions. Polymer-filled joints and coatings start
Autor:
Yongsoon Shin, Yigal D. Blum, William D. Samuels, Jessica D. Torrey, Rajendra K. Bordia, Charles H. Henager
Publikováno v:
Journal of Materials Science. 41:4617-4622
Preceramic polymers and expansion agents are being investigated to produce composite ceramic coatings for oxidation protection of metallic substrates. In this paper, we present results of a systematic approach to selecting the preceramic polymer and
Publikováno v:
International Journal of Materials Research. 97:710-720
In this Part II of the paper on the evolution of carbon-rich Si–O–C polymer-derived ceramics (PDCs), emphasis is placed on the strengths and limitations of transmission electron microscopy (TEM) techniques with high lateral resolution, i. e., ele
Autor:
Florence Babonneau, Giuliano Gregori, Hans-Joachim Kleebe, Yigal D. Blum, D. Brent MacQueen, Sylvie Masse
Publikováno v:
International Journal of Materials Research. 97:699-709
Carbon-rich Si–O–C polymer-derived ceramics (PDCs) were investigated by various spectroscopic techniques, in order to characterize the evolution of their predominantly amorphous microstructure upon thermal treatment up to 1450°C. Particular atte