NASA Mirror Technology Days –2017 / NASA SBIR CFE Services Lightweight Stable Optical Structures using Silicon Carbide B. anzaro, Noveer 15, 2017 NASA Mirror Technology Days –2017 / NASA SBIR Over Arching Goal of SBIR Reduce the Mass, Time
The flexural strength data for as-received and joined sintered silicon carbide (Hexoloy-SA) are shown in Fig. 5 (b). The 23°C, 1250, and 1350°C flexural strength of as-received Hexoloy-SA specimens were 402±26, 392±8, and 402±9 MPa, respectively.
Silicon carbide offers high hardness, high strength, and high thermal conductivity — characteristics that are superior to alternatives such as glass, glass-ceramics, and metals that are often used for reflective optical systems. And unlike glass and glass
Silicon Oxycarbide is a novel amorphous ceramic glass containing silicon, oxygen, and carbon atoms in various ratios. Because of its high thermal stability, durability, corrosion resistance, and other unique properties, it has numerous appliions in fields such as additive manufacturing, lithium-ion batteries, and advanced optics.
NASA Aeronautics Research Institute Introduction •Advanced aircraft engines require the use of reliable, lightweight, creep-resistant and environmentally durable materials. •Silicon carbide-based ceramic matrix composite (CMC) technology is being developed to
Silicon Carbide Fiber Tows Glenn''s processing method not only produces higher-quality SiC fiber tows more consistently, it also heals poorer-quality fibers that would otherwise be unusable. Innovators at NASA''s Glenn Research Center have developed a rapid processing method that produces stronger, tailored silicon carbide (SiC) tows and even heals damaged or otherwise low-quality fibers.
NASA requires fine-featured, durable grids as merane supports for X-ray, EUV, and particle detectors. SiC also offers a path for providing merane support mesh with superior X-ray transmittance, usable in instruments such as spectrometers, without generating fluorescence artifacts associated with metal grids.
Silicon Carbide (SiC) optical constants are fundamental inputs for radiative transfer models of astrophysical dust environments. However, previously published values contain errors
Converted silicon carbide technology developments for optics Converted silicon carbide technology developments for optics Duston, Christopher; deBlonk, Brett 2007-09-13 00:00:00 ABSTRACT Silicon carbide structures fabried by converting near-net-shape graphite preforms via Chemical Vapor Conversion (CVC) phase reaction have long provided improved performance components for …
NASA Lewis Research Center, Cleveland, Ohio 44135 Meer, American Ceramic Society. NRC Resident Research Associate. Kotoji Ando, Crack-healing behavior and resultant strength properties of silicon carbide ceramic, Journal of the European Ceramic,
The polycrystalline silicon carbide fiber typically has a tensile strength of at least 2,070 MPa, preferably at least 2,760 MPa. The polycrystalline silicon carbide fiber typically has a modulus of 345 to 414 GPa, preferably 345 to 483 GPa.
15/7/2019· Engages in research, development, and flight appliion of advanced materials, structures, and mechanisms for aerospace systems, with activities ranging from materials research at nanoscale to design and testing of structures and mechanical systems for aeronautics and space flight programs. Research and development activities are focused on developing enabling technologies for high
A commercially available, sintered silicon carbide was exposed to a temperature of 982 C for up to 50 h in a burner rig pressurized to 500 kPa. Synthetic sea salt added to the flame (5 ppm) resulted in the deposition of sodium sulfate and formation of a sodium magnesium silie corrosion product.
Abstract Non-oxide ceramic fibers are being considered for many appliions, but are currently being developed and produced primarily as continuous-length structural reinforcement for ceramic matrix composites (CMC). H. Ichikawa and T. Ishikawa, Silicon Carbide
Amorphous silicon carbide fibers lose their strength due to re-crystallization at temperatures above 1,250 C (2,280 F). Therefore, carbon fibers in a silicon carbide matrix (C/SiC) are used in development programs for these appliions.
Silicon Carbide This material has a high strength, low density, oxidation resistance (reaction bonded) characteristics. Quality thermal shock resistance, high hardness, wear resistance, low thermal expansion and electrical conductivity.
Silicon Carbide Fiber Products The World''s Premier Silicon Carbide (SiC) Fibers SiC Ceramic Fibers are Used in Space, Aerospace and Power Generation High Temperature Structural Composites - Hot Gas Flow Components and Survivability Appliions
NASA/TM—1999-209197 June 1999 The NASA STI Program Office . . . in Profile Since its founding, tailorable thickness and good high temperature strength. In this study, silicon carbide-based ceramic and FRCMC attachments of different shapes and sizes
The ability to print near-net shapes in silicon carbide will increase design freedom and reduce production cost/time. This research will therefore have significant impact for space exploration. This development effort will generate new knowledge about the additive manufacturing of silicon carbide and enable the production of silicon carbide mirrors.
Stress intensity factors were measured for single-edge notched silicon carbide specimens subjected to three-point bending. These data are compared with experimental results from surface flawed specimens subjected to three-point bending. Surface flawed specimens were tested since they resele defects in structures more closely than any other specimen. The ability to estimate failure conditions
Institute of Physics Conf. Series 137: Silicon Carbide and Related Materials, pp. 475-478 Paper presented at the 5th SiC and Related Materials Conf., Washington, DC, 1993 2000 V 6H-SiC PN Junction Diodes P G Neudeck1, D J Larkin1, C S Salupo2, J A Powell1, and L G Matus1
I came to work for NASA after completing my PhD in Mechanical Engineering at Texas A&M University in August 2011. field assisted sintering technique to significantly repair, heal and improve the strength of commercially available silicon carbide (SiC