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pressure-assisted sintering

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000059
EISBN: 978-1-62708-312-6
... parts were even sintered in N 2 -H 2 atmospheres containing as little as 3% H 2 . As is shown later, such parts had very low corrosion-resistance requirements. Vacuum sintering of stainless steels is conducted with low pressures (1000 to 3000 μm Hg) of argon or nitrogen to minimize chromium losses due...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290169
EISBN: 978-1-62708-319-5
.... Hot isostatic pressing supplements densification by using a high-pressure gas. References 1. Kim Y.D. , Sonezaki K. , Maeda H. , and Kato A. , Sintering Behaviour of Monodispersed ZnS Powders , J. Mater. Sci. , Vol 32 , 1997 , p 5101 – 5106...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290201
EISBN: 978-1-62708-319-5
... S. , Takahashi Y. , and Miyamoto H. , Low Pressure Injection Molding and HIP Sintering of Al 2 O 3 of High Purity , J. Jpn. Soc. Powder Powder Metall. , Vol 38 , 1991 , p 782 – 786 10.2497/jjspm.38.782 • Montgomery J.K. , Drzal P.L. , Shull K.R. , and Faber K.T...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000167
EISBN: 978-1-62708-312-6
... vacuum sintering at 1255 °C (2290 °F), in 1 h. Their investigation included the effects of compaction pressure and particle size distribution of the powder components on joint strength. Two types of joint designs were studied: in one, the permalloy was the core component, and in the other, 410L was the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230267
EISBN: 978-1-62708-298-3
.... , Habashi F. , and Hanson G.T. , 1965 . “ The Preparation of Ultra-Fine Beryllium Powder by the Amalgam Process ,” Report on NASA Contract NASW 1099, General Astrometals Corporation Greenspan J. , 1964 . High Pressure Isostatic and Pressureless Sintering of Some Metal Powder Compacts...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000185
EISBN: 978-1-62708-312-6
... and other applications of similar porosities are usually made from water-atomized stainless steel powders by pressing and sintering, similar to the manufacture of structural parts. However, loose powder sintering in trays or molds, cold isostatic compaction, and binder-assisted extrusion are also used...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560125
EISBN: 978-1-62708-291-4
... proeutectoid ferrite and cementite. It explains how ferrite and pearlite respond to deformation and how related features such as slip lines, dislocations, shear bands, and kinking can be detected as well as what they reveal. It also describes the structure of patented wires, cast steels, and sintered steels...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550569
EISBN: 978-1-62708-307-2
..., continuous fiber ceramic composites, and carbon-carbon composites. It also describes a number of ceramic-matrix composite processing methods, including cold pressing and sintering, hot pressing, reaction bonding, directed metal oxidation, and liquid, vapor, and polymer infiltration. ceramic-matrix...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240017
EISBN: 978-1-62708-251-8
... pressure is used during the sintering process by either hot pressing in a press or hot isostatic pressing under gas pressure. From our knowledge of the metallic bond, it is possible to derive a theoretical value for the stress required to produce slip by the simultaneous movement of atoms along a plane...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000001
EISBN: 978-1-62708-312-6
... chloride exposure testing, optimally sintered tin-copper surface-modified stainless steels exhibit corrosion-resistance improvements of an order of magnitude over their unmodified equivalents, in addition to machinability improvements that equal or exceed (the free machinability grade) 303L. Boron-assisted...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.9781627083195
EISBN: 978-1-62708-319-5
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290001
EISBN: 978-1-62708-319-5
... in dimensions. The forming tool is often fabricated with great precision, but the forming process has natural variation in temperature, pressure, and feedstock homogeneity. As the binder is removed, component swelling and shrinkage contribute to dimensional change. Sintering amplifies that...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290251
EISBN: 978-1-62708-319-5
... the structure. This is a means to form high-temperature insulation bricks using distended ceramics. On the other hand, if the excess water is removed, the feedstock is suitable for molding at modest pressures (20 MPa, or 2.9 ksi) and sintering to high density. Another idea involving powders...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290139
EISBN: 978-1-62708-319-5
... Slow heat to 600 °C (1110 °F) Melt and decompose binder in selected atmosphere Vacuum Slow heat to 600 °C (1110 °F), continue to sintering temperature Melt and evaporate binder in low-pressure vacuum furnace Sublimation Cold, for water <0 °C (30 °F) to avoid melting Temperature and...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120047
EISBN: 978-1-62708-269-3
... the part is attained. Press consolidation allows rapid (or lower-temperature) compaction of powder inside a shaped, evacuated can. Very high pressures are attainable and, with certain die designs, close to 100% density is claimed after pressing and vacuum sintering. Powder can be compacted by...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290067
EISBN: 978-1-62708-319-5
.... A deficiency of binder allows for near full density but with considerable pressurization. Unfortunately, tooling is short-lived when high compaction pressures are employed, and therefore, binder-assisted routes are especially favored in shaping hard particles such as carbides, ceramics, and...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290111
EISBN: 978-1-62708-319-5
... shape, oversized for the anticipated sintering shrinkage. The combination of temperature-pressure and tool actions depends on the forming machine. Indeed, the success of each shaping approach critically depends on matching the forming conditions, tooling and tool motions, feedstock viscosity, and...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170614
EISBN: 978-1-62708-297-6
... 0.45% P compacted at pressures of: 0.80% P compacted at pressures of: 410 MPa (30 tsi) 550 MPa (40 tsi) 685 MPa (50 tsi) 410 MPa (30 tsi) 550 MPa (40 tsi) 685 MPa (50 tsi) Sintered density, g/cm 3 6.80 7.10 7.23 6.88 7.12 7.28 Induction, for a field of 1200 A/m (15 Oe), T (kg...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230361
EISBN: 978-1-62708-298-3
... beryllium is too weak, lacks ductility, and must be sintered. (Sintering refers to the heating of a material to a high temperature, sometimes under pressure, to decrease or eliminate porosity and increase density. Generally, the melting points of low-melting constituents at the grain boundaries are exceeded...
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
... deagglomerate the particles. Powder characteristics depend on the synthesis route, chemistry, and impurities. Generally, the powders employed in binder-assisted processes are small to enable sintering, typically from 0.1 to 100 μm. The cost of powder varies considerably, so the selection of a fabrication route...