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viscous sintering

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Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290169
EISBN: 978-1-62708-319-5
... exist, such as WC-Co, W-Ni-Fe, Mo-Ni, iron-copper, and most ceramics. For example, AlN is treated with Y 2 O 3 to form a viscous (glassy) grain-boundary phase. It is difficult to densify systems such as SiC and Si 3 N 4 ; therefore, additives are employed for sintering. Fig. 8.6 Microstructure...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290201
EISBN: 978-1-62708-319-5
... Abstract This chapter provides details on powder-binder processing for three materials, namely precipitation-hardened 17-4 PH stainless steel, cemented carbides, and alumina. The types of powders, binders, feedstock, shaping processes, debinding, sintering cycles, compositions, microstructure...
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
... Abstract This chapter discusses the growing use of sintered stainless steels in automotive applications and various types of filters and filtering media. It also describes how these materials are produced in the form of metal foams and cellular structures and how they serve as flake pigments in...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730139
EISBN: 978-1-62708-283-9
... state. The elevated temperatures during hot working have several undesirable effects. Among them are: Lubrication is more difficult. Although viscous glasses often are used in hot extrusions, most hot working is done without any lubrication. The work metal tends to oxidize. Scaling of steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.9781627083195
EISBN: 978-1-62708-319-5
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290251
EISBN: 978-1-62708-319-5
... came from the availability of small powders that sinter to near-full densities. Shaping relied on the adoption of plastic forming options. Currently, other materials are available with small particle sizes, including stainless steel at 0.1 μm. New opportunities come from new materials, material...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000023
EISBN: 978-1-62708-312-6
... Producing Metal Powder , U.S. Patent 3,309,733 , 1967 11. Leyton R.C. and Andersson O. , High Density Sintered Stainless Steel with Close Tolerances , Advances in Powder Metallurgy and Particulate Materials , Vol 7 , MPIF 2002 , p 118 – 126 12. Okura Y. and Kono T...
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
.... , Aronniemi M. , Mattila T. , Alastalo A. , Ojanpera K. , Suhenen M. , and Seppa H. , Electrical Sintering of Nanoparticle Structures , Nanotechnology , Vol 19 , 2008 , Paper 175201 10.1088/0957-4484/19/17/175201 • Arakida Y. , A Trend of the Development on Powder...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060117
EISBN: 978-1-62708-261-7
... LC LC A LC Die casting NA NA NA NA A LC A A NA NA NA Impact extrusion NA A A LC A A A LC NA NA NA Cold heading NA A A A A A LC LC NA LC NA Closed die forging NA A A A A A NA A A LC LC Pressing and sintering (PM) NA A A A A A NA A...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290035
EISBN: 978-1-62708-319-5
.../10426914.2011.560233 • Fan Y.L. and Hwang K.S. , Properties of Metal Injection Molded Products Using Titanate-Containing Binders , Mater. Trans. , Vol 48 , 2007 , p 544 – 549 10.2320/matertrans.48.544 • German R.M. , Thermal Extraction of Binders and Lubricants in Sintering , Gas...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480161
EISBN: 978-1-62708-318-8
.... Kroll, the inventor of the magnesium-reduction process bearing his name. Two basic methods were studied by Kroll, the U.S. Bureau of Mines, and private industries. One method used PM techniques for cold compaction and sintering. These steps were followed, in some cases, by hot or cold working to produce...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540297
EISBN: 978-1-62708-309-6
... psi) at 1373 K (1100 °C, 2010 °F). (e) Sintered, at 300 K (27 °C, 80 °F). (f) Sintered, at 1273 K (1000 °C, 1830 °F). (g) Hot pressed, at 300 K (27 °C, 80 °F). (h) Hot pressed, at 1273 K (1000 °C, 1830 °F). (j) At 300 K (27 °C, 80 °F). (k) At 1473 K (1200 °C, 2190 °F). (m...
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
.... It is often said that the glass in the stained glass windows in European cathedrals is thicker at the bottom than at the top because they have flowed viscously over the centuries. Observable thickening at the bottoms by creep under self-weight would make the windows shorter. A 10% thickening at the...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610327
EISBN: 978-1-62708-303-4
...). (e) Sintered at 27 °C (80 °F). (f) Sintered at 1000 °C (1830 °F). (g) Hot pressed at 27 °C (80 °F). (h) Hot pressed at 1000 °C (1830 °F). (j) At 300 K (27 °C, or 80 °F). (k) At 1473 K (1200 °C, or 2190 °F). (m) Sintered. (n) Hot pressed. (p) Reaction bonded. Source...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290085
EISBN: 978-1-62708-319-5
..., regions with low powder content crack during sintering. Likewise, too high a pressure causes mold opening and flashing. Too high a forming temperature decomposes the binder. Thus, feedstock design starts by knowing the forming details. Fig. 5.1 The idea of a forming window, in this case for...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460017
EISBN: 978-1-62708-285-3
... achieved if the thermal softening overcompensates the strain hardening and strain-rate hardening of the material, resulting in so-called adiabatic shear instabilities (ASI) ( Ref 2.23 , 2.34 , 2.41 ). Temperatures close to the melting point of the material can then be attained, resulting in viscous flow...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230071
EISBN: 978-1-62708-298-3
... Bayliss R.K. , and Derry R. , 1963 . “ Further Studies of the Breakdown of Beryl and Beryl Concentrates by Fusion Methods ,” National Chemical Laboratory Blainey A. , Johnston T.L. , and Jones J.W.S. , 1954 . “ The Sintering of Beryllium Powder Prepared from Electrolytic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290279
EISBN: 978-1-62708-306-5
... When designing butt joints between dissimilar metals, consideration must be given to the melting characteristics of each base metal and the filler metal and to dilution effect. Large grooves decrease dilution, permit better control of viscous weld metal, and provide room for better manipulation of the...