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alumina-silica fibers

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870573
EISBN: 978-1-62708-314-0
... such as alumina, or nonoxide fibers such as silicon carbide, are used in glass, glass-ceramic, and crystalline ceramic matrices. Most high-performance oxide and nonoxide continuous fibers are expensive, further increasing the high cost of ceramic matrix composites. The cost and great difficulty of consistently...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550569
EISBN: 978-1-62708-307-2
... at temperatures greater than 1200 °C (2190 °F) and have a maximum-use temperature of not more than 1400 °C (2550 °F). Current-generation oxide fibers, such as Al 2 O 3 , are polycrystalline materials with silica at their grain boundaries. As a result, alumina-base fibers begin to creep at temperatures as low...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730081
EISBN: 978-1-62708-283-9
.... Oxidation at high temperatures is not a problem with refractory oxides as it is with refractory metals. Magnesia, alumina, and silica are used as refractories. (Oxides are named by substituting “a” for “ium” or “um” at the end of a metal’s name. Thus, alumina is aluminum oxide, and soda is sodium oxide...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870031
EISBN: 978-1-62708-314-0
... shapes and is very difficult to machine. Other high-temperature ceramic fibers, such as silicon carbide (Nicalon), aluminum oxide, and alumina boria silica (Nextel), are frequently used in ceramic-based composites but rarely in polymer-based composites. The stress-strain curves in Fig. 2.2 show...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240607
EISBN: 978-1-62708-251-8
... during casting or high-temperature silica or alumina compounds that require firing before casting. Fig. 33.7 Saffil alumina fiber preform Squeeze casting is attractive because it minimizes material and energy use, produces net shape components, and offers the capability for selective...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290251
EISBN: 978-1-62708-319-5
... are added to the powder-binder formulation. The fibers are selected to add strength after sintering. Demonstrations of aligned-fiber composites include matrix phases of alumina, silicon nitride, stainless steel, and intermetallic compounds. Two images in Fig. 11.2 illustrate alignment. Figure 11.2...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550001
EISBN: 978-1-62708-307-2
... particles/aluminum. (e) SCS-6 silicon carbide fiber/titanium. (f) Alumina reinforced with 25% SiC whiskers. (g) Bend strength. (h) Woven SiC/SiC 1.2 Aluminum Alloys Aluminum alloys have many outstanding attributes that lead to a wide range of applications, including: Good...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550457
EISBN: 978-1-62708-307-2
... the AA-registered alloy 2124 reinforced with 25 vol% of silicon carbide whiskers; 7075/Al 2 O 3 /10p is the AA-registered alloy 7075 reinforced with 10 vol% of alumina particles; 6061/SiC/47f is the AA-registered alloy 6061 reinforced with 47 vol% of continuous SiC fibers; and A356/C/05c is an AA...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870537
EISBN: 978-1-62708-314-0
... weight percent) can either be fugitive ones that are burned off during casting or high-temperature silica or Al 2 O 3 compounds that require firing before casting. Fig. 20.11 Saffil alumina fiber preform 20.5.1 Squeeze Casting Squeeze casting is a metal-forming process in which...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300271
EISBN: 978-1-62708-323-2
...-body abrasion test (in accordance with ASTM International G174) using 30 μm alumina finishing tape Fig. 10.13 Wear of candidate materials after an 8 h silica tape abrasion test (in accordance with ASTM International G174) Erosion Resistance Slurry abrasion resistance usually follows...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290009
EISBN: 978-1-62708-319-5
... as 30 nm wide islands. Carbon species account for most of the remained surface area. Oxide ceramic particles have bonded hydroxide groups, and these are much more stable than water surface layers. Alumina has an abundance of moisture and oxides such as silica and calcia. Heating any of these powders...
Book Chapter

By M. B. Kasen
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860413
EISBN: 978-1-62708-348-5
... of glass (about 69 GPa, 10 7 psi) the dividing line. This reflects a historical development: glass-reinforced composites were the first to be developed and widely used. Low-modulus fibers are generally cellulose (cotton, linen) and glass. High-modulus fibers are graphite, boron, alumina, organic aramids...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
..., it does not conform well to complicated shapes and is very difficult to machine. Other high-temperature ceramic fibers, such as silicon carbide (Nicalon), aluminum oxide, and alumina boria silica (Nextel), are frequently used in ceramic-based composites but rarely in polymeric composites...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850060
EISBN: 978-1-62708-260-0
... deformation (a) Total deformed layer (b) Type Grade Abrasive cutoff wheel Alumina A 60 DE wheel Proprietary oil-water emulsion 4 16 700 Hand hacksaw 18 t.p.i., roll-set blade Nil 100 55 750 Surface grinding Alumina 28A 46 KVBE wheel 0.001-in feed, machine surface grinding...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550385
EISBN: 978-1-62708-307-2
...), aluminum oxide, and alumina boria silica (Nextel), are frequently used in ceramic-based composites but rarely in polymeric composites. The following factors should be considered when choosing between glass, aramid, and carbon fibers: Tensile strength . If tensile strength is the primary design...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060163
EISBN: 978-1-62708-355-3
... types: discontinuously reinforced CMCs (for example, particulate-or whisker-reinforced materials) and continuous fiber-reinforced materials. These advanced ceramic materials exhibit superior mechanical properties, corrosion/oxidation resistance, or electrical, optical, and/or magnetic properties when...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550511
EISBN: 978-1-62708-307-2
.... This chapter describes the applications, properties, and behaviors of some of the more widely used structural ceramics, including alumina, aluminum titanate, silicon carbide, silicon nitride, zirconia, zirconia-toughened alumina (ZTA), magnesia-partially stabilized zirconia (Mg-PSZ), and yttria-tetragonal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400087
EISBN: 978-1-62708-258-7
... to ensure that there is no rounding of the edges of the coating. If rounded, the mound should be reground, starting at 600 grit until flat. Polishing: The specimens will be polished using an aqueous 1 μm alumina (Al 2 O 3 ) solution on a napless cloth. First, use a stationary wheel or flat surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230221
EISBN: 978-1-62708-351-5
... the nonmetal by virtue of chemical bonding between them. Copper wetted on to alumina via the copper-cuprous oxide eutectic is an example of the latter. Direct brazing of nonmetals, i.e., without first applying a surface metallization, differs from the brazing of metals in three important respects...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220069
EISBN: 978-1-62708-259-4
... are alumina suspensions, diamond paste, and colloidal silica suspensions. Polishing can be performed in manual or automatic polishing machines. When repetitive sample preparation is needed (for instance, quality control metallography, in industry) automatic polishing machines can be very convenient...