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high strength brittle ceramics

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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003060
EISBN: 978-1-62708-200-6
... higher fracture toughness. Even for silicon nitride, the metal design cannot be applied directly because of its brittleness. When the metal design is used for the ceramic rotor, the rotor usually fractures at low speed due to stress concentration. Silicon nitride, with high average strength and high...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003057
EISBN: 978-1-62708-200-6
.... The article describes testing methods such as room and high-temperature strength test methods, proof testing, fracture toughness measurement, and hardness and wear testing. It also explains methods for determining thermal expansion, thermal conductivity, heat capacity, and emissivity of ceramics and...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003054
EISBN: 978-1-62708-200-6
... difficulties limit the use of zirconia furnaces to laboratory applications where extremely high temperatures are required in an oxidizing atmosphere. A periodic furnace heats ceramic material from room temperature (or near) to operating conditions, then cools it to room temperature. The principal...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003842
EISBN: 978-1-62708-183-2
... research is given. Ultimately, the concern of corrosion is loss of load-bearing capability. The effects of corrosive environments on the strength of ceramics, both monolithic and composite, are considered, as is the high-temperature wear of ceramics, another important form of degradation at high...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003051
EISBN: 978-1-62708-200-6
... electrical 0–0.2 Low-frequency insulators High-strength electrical 0–0.2 Low-frequency insulators Dental 0–0.1 Dentures Technical ceramics Steatite 0–0.05 High-frequency insulators, low-loss dielectrics Electrical porcelains 0–0.2 Low-frequency insulators Table 8 Typical...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003056
EISBN: 978-1-62708-200-6
... ceramic shapes are often required that can be made only by joining together less complex shapes. Because the requirements of a ceramic joint can vary from application to application (e.g., hermeticity, ductile strain relief, corrosion resistance, high-temperature strength), the ability to tailor the...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003058
EISBN: 978-1-62708-200-6
... strength, a surface flaw is created that develops only in the region of locally high stress. The resultant surface crack concentrates the applied stress and can nucleate the catastrophic fracture event. Once the catastrophic crack has been nucleated, it will begin to spread from the origin under...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003059
EISBN: 978-1-62708-200-6
... the production engineer. The need is no longer for characteristic numbers or typical values; it is for sets of quantified values for properties of interest that can be used now. The current high-level need for useful property data for ceramics and glasses challenges many scientists and engineers...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003055
EISBN: 978-1-62708-200-6
... ceramics requires that the initiation and propagation of brittle fracture be minimized. In addition, if the grinding operation occurs predominantly in the deformation mode, high strength, good surface finish, and complex geometries can be generated by the grinding of ceramics. This requires a careful...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006671
EISBN: 978-1-62708-213-6
... just a few atoms thick, on grain boundaries of nonoxide and oxide ceramics can promote creep and plastic stress relief at elevated temperature and affect ambient strength as well. High-temperature ceramic superconductors require close control of the formation of specific phases. Many commercial...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003061
EISBN: 978-1-62708-200-6
... reliable performance. A Si 3 N 4 -based ceramic grade is formulated to combine the characteristic high hardness of ceramic cutting materials with superior high-temperature strength, oxidation resistance, fracture toughness, and thermal shock resistance. With such properties, the silicon nitrides provide...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005655
EISBN: 978-1-62708-198-6
... ceramics do not induce a direct bond with the host tissue; instead they are encapsulated by a characteristic thin layer of fibrous tissue after implantation. High-density, high-purity alumina, Al 2 O 3 , has high wear resistance, high strength, good corrosion resistance, and good biocompatibility, making...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003062
EISBN: 978-1-62708-200-6
... various active devices. Glass insulators, ceramic heater substrates for microelectronics packaging, are all primarily used in this mode. Often, however, the ceramic material must exhibit other important characteristics, including temperature, corrosion and environmental stability, high mechanical strength...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005675
EISBN: 978-1-62708-198-6
... body), high stiffness, and low friction and wear as articulating surfaces. Their main drawback is their brittle nature and resultant low impact resistance. Thus, a few examples are known where ceramic particles are combined to form composites while retaining properties such as the capability to...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001280
EISBN: 978-1-62708-170-2
... application of ceramic coatings Table 2 Compositions of melted silicate frits for high-temperature service ceramic coatings Constituent Percentage for specific frits (a) UI-32 UI-285 UI-346 UI-418 NBS-11 NBS-331 NBS-332 Silicon dioxide (SiO 2 ) 56.5 51.1 57.0 37.0 42.0...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003063
EISBN: 978-1-62708-200-6
... are SiC, Si 3 N 4 , B 4 C, and BN. Continuous ceramic fibers are attractive for reinforcing ceramic materials. They combine high strength and elastic modulus with high-temperature stability and general freedom from environmental attack, making them appropriate for use in high-temperature...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001320
EISBN: 978-1-62708-170-2
... Abstract The classes of tool materials for machining operations are high-speed tool steels, carbides, cermets, ceramics, polycrystalline cubic boron nitrides, and polycrystalline diamonds. This article discusses the expanding role of surface engineering in increasing the manufacturing...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003005
EISBN: 978-1-62708-200-6
... typically insulative to the passage of electricity and heat, and they are more resistant to high temperatures and harsh environments than metals and polymers. With regard to mechanical behavior, ceramics are hard but very brittle. Ceramics are classified as traditional or advanced. Polymers include...
Book Chapter

By Matthew Donachie
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003168
EISBN: 978-1-62708-199-3
... experience very high point forces in the mouth, creep and compressive yield strengths are important. Ceramics offer excellent compressive yield, and thus are often used for such applications. Tension and bending or tension fatigue are not primary strength attributes for study in ceramics because tensile...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005255
EISBN: 978-1-62708-187-0
.... (b) A general-purpose slurry. (c) A high-strength slurry used for ceramic shell molds for castings with heavy sections and for applications in which high wax pressure during meltout and high metal pressure are used. (d) Modified with silica; used with castings with small cored holes from...