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beta-phase silicon carbide

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Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003357
EISBN: 978-1-62708-195-5
.... continuous-length ceramic fibers oxide fibers alumina-silica fibers alpha-alumina fibers nonoxide fibers beta-phase silicon carbide high-temperature ceramic-matrix composites CONTINUOUS-LENGTH CERAMIC FIBERS are commercially available in two general classes for the reinforcement of ceramic-matrix...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003140
EISBN: 978-1-62708-199-3
... phases and martensitic transformations formed in titanium alloy systems. Information on commercial and semicommercial grades and alloys of titanium is tabulated. The article also discusses the different grades of titanium alloys such as alpha, near-alpha alloys, alpha-beta alloys, beta alloys, and...
Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006226
EISBN: 978-1-62708-163-4
... Abstract Similar to the eutectic group of invariant transformations is a group of peritectic reactions, in which a liquid and solid phase decomposes into a solid phase on cooling through the peritectic isotherm. This article describes the equilibrium freezing and nonequilibrium freezing of...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003734
EISBN: 978-1-62708-177-1
... are both solid. An example of a peritectoid transformation is provided by the formation of the intermetallic compound U 3 Si in uranium-silicon alloys ( Ref 21 ). The relevant phase diagram is shown in Fig. 20 . Casting uranium at the proper concentration of silicon (3.78%) results in a mixture of...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003795
EISBN: 978-1-62708-177-1
... Secondary phase remain SiC with 5–15% oxide Additions   60 mL distilled H 2 O 5–30 min at 110 °C (230 °F) Alpha/alpha (α/α) grain boundaries. Alpha/beta (α/β) phase boundaries SSiC   30 g K 3 Fe(CN) 6   3 g NaOH   20 mL distilled H 2 O 5–10 min Grain-boundary etchant SSiC doped with B...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003033
EISBN: 978-1-62708-200-6
... refractive index is not presented in Table 3 , it generally will range from approximately 0.0030 to 0.0060 below that of the annealed glass sample. E-glass fibers have excellent resistance to all types of nuclear radiation. Alpha and beta radiation have almost no effect, while gamma radiation and...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003005
EISBN: 978-1-62708-200-6
... enhances corrosion-resistant properties. The large volume fraction of primary and/or eutectic carbides provides the high hardness (up to 800 HB) needed for crushing and grinding other materials. The metallic matrix supporting the carbide phase in these irons can be adjusted by alloy content and heat...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001416
EISBN: 978-1-62708-173-3
.... alpha and near-alpha titanium alloys alpha-beta titanium alloys beta and near-beta beta alloys material selection metastable-beta alloys physical metallurgy titanium-base alloys weldability ADVANCED TITANIUM-BASE ALLOYS can generally be categorized as having conventional (terminal phase...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003779
EISBN: 978-1-62708-177-1
...” phase. This structure transforms to a body-centered cubic (bcc) crystal structure, called “betaphase, at 883 °C (1621 °F). Alloying elements generally can be classified as alpha or beta stabilizers. Alpha stabilizers, such as aluminum and oxygen, increase the temperature at which the alpha phase is...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001081
EISBN: 978-1-62708-162-7
... and chemical properties, including chemical composition, corrosion resistance, and chemical reactivity. The Article discusses the effects of alloying elements in titanium alloys, and describes the classes of titanium alloys, namely, alpha alloys, alpha-beta alloys, and beta alloys. It also describes...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003741
EISBN: 978-1-62708-177-1
... nickel-base superalloy might be written as: (Eq 1) γ + β / γ + γ ′ in which the MCrAlY coating is a mixture of gamma and beta phases, while the superalloy is a mixture of gamma and gamma prime phases. The interdiffusion microstructure is represented in a similar way, except now the...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006274
EISBN: 978-1-62708-169-6
... intentionally in alloy formulation. Beta stabilizers, such as manganese, chromium, iron, molybdenum, vanadium, and niobium, lower the α-to-β transformation temperature and, depending on the amount added, may result in the retention of some β phase at room temperature. Depending on the alloying with alpha and...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006256
EISBN: 978-1-62708-169-6
... achieved by water quenching produce high residual stresses in beta-treated material. In thin sections, these residual stresses can produce appreciable plastic deformation in the alpha phase. This alpha phase can be recrystallized, and sometimes grain refined, by an anneal in the alpha range. Alpha...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006283
EISBN: 978-1-62708-169-6
...; properties may be modified by morphology changes in the microstructure. Alpha-beta alloys are two-phase mixtures with room-temperature stability. The α/β alloys are the most common and most versatile of the three alloy types. The phase composition, grain size, and phase distribution can be manipulated...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003623
EISBN: 978-1-62708-182-5
... resistance. Weldments and castings of CP grades and alpha-beta alloys such Ti-6Al-4V generally exhibit corrosion resistance similar to that of their unwelded, wrought counterparts. These titanium alloys contain so little alloy content and second phase that metallurgical instability and thermal response are...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001440
EISBN: 978-1-62708-173-3
... caused by phase transformation in the weld zone or in the HAZ. Alpha-beta alloys can be welded autogeneously or with various filler metals. It is common to weld some of the lower-alloyed materials with matching filler metals. Filler metal of an equivalent grade or one grade lower is used to ensure good...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001283
EISBN: 978-1-62708-170-2
... CVD of hard, tribological, and high-temperature coatings, as well as free-standing structures. The CVD process can be defined as the deposition of a solid on a heated surface via a chemical reaction from the vapor or gas phase. It belongs to the class of vapor-transport processes that...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001267
EISBN: 978-1-62708-170-2
... are three nonequilibrium phases for the as-plated electroless nickel deposit: beta, beta + gamma, and gamma. The beta phase is present up to a phosphorus content of 4%; above 4%, there is a mix of beta and gamma. When the deposit has more than 11.2% P, the deposit is gamma-phase. Upon heat treating...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003085
EISBN: 978-1-62708-199-3
... Abstract Alloy phase diagrams are useful for the development, fabrication, design and control of heat treatment procedures that will produce the required mechanical, physical, and chemical properties of new alloys. They are also useful in solving problems that arise in their performance in...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003247
EISBN: 978-1-62708-199-3
... polishing, because deformation caused by cutting and grinding extends to a greater depth. Embedding of abrasive particles in the metal during polishing is more likely, and relief between the matrix and second-phase particles, which are much harder than the matrix, will develop more readily during polishing...