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particle shape analysis

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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
... Shape and Packing Density 2.2.3 Surface Area 2.2.4 Powder Flow and Rheology 2.2.5 Chemical Analysis Early powders were obtained by milling. Over time, other means emerged to fabricate particles, providing expanded options in chemistry, purity, particle size, and particle shape. The general...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460173
EISBN: 978-1-62708-285-3
... analysis assumes that the particles to be measured have near-spherical shape, so particles with irregular or needlelike shape can distort the results. Laser diffraction is more advantageous in the range of very fine powders (below 15 μm) and is therefore commonly used for determination of the lower...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850410
EISBN: 978-1-62708-260-0
... not introduce bias into the measurement. Figure 6-6 Example illustrating three methods for estimating V v using an idealized microstructure of spherical particles intersected by a sectioning plane. Areal analysis V V α = Σ A α A T = areas of circles frame...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000023
EISBN: 978-1-62708-312-6
..., particle size distribution, and particle shape, so as to produce powders that are suited for their intended uses and to conduct the powder production process in a cost-effective way. Intended uses of powders are most often discussed in terms of specific requirements of their engineering properties...
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.t59290067
EISBN: 978-1-62708-319-5
..., the voids between the particles are saturated with the mixture of filler-backbone-surfactant. In cases where heat and shear are used for shaping, such as extrusion and powder injection molding, the binder mixed with the powder is essentially solid at room temperature (for example, paraffin wax-polypropylene...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290085
EISBN: 978-1-62708-319-5
... and particle shape, giving critical solids loading that ranges from 20 to 86 vol%. The latter is obtained with bimodal blends of different particle sizes, say 73% of the larger particle size, with the ratio of the large and small particle size being 7:1. (This particle ratio corresponds to one small particle...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740373
EISBN: 978-1-62708-308-9
...Abstract Abstract This chapter covers the basic steps of the powder metallurgy process, including powder manufacture, powder blending, compacting, and sintering. It identifies important powder characteristics such as particle size, size distribution, particle shape, and purity. It compares...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410163
EISBN: 978-1-62708-265-5
... ( Ref 9.4 ). Indigenous inclusions occur, often as very fine particles, in huge numbers in steel, while exogenous inclusions may occur sporadically as coarse, irregularly shaped particles. Figure 9.2 shows a schematic diagram of a continuous slab casting machine ( Ref 9.8 ). Machines that cast...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460067
EISBN: 978-1-62708-285-3
... , Shock Waves @ Marseille I , Springer , 1995 , p 377 – 382 10.1007/978-3-642-78829-1_61 3.30 Grujicic M. , Saylor J.R. , Beasley D.E. , DeRosset W.S. , and Helfritch D. , Computational Analysis of the Interfacial Bonding between Feed-Powder Particles...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230267
EISBN: 978-1-62708-298-3
... be performed, but the properties of the sintered billets are not equal to properties of hot pressed material. Plasma-sprayed thin-walled preforms may be sintered into hollow shapes with satisfactory properties. Control of the beryllium particle size distribution and impurity control is essential to achieve...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.9781627082563
EISBN: 978-1-62708-256-3
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
... and Debinding Behavior of Extruded Pipes Containing a Water Based Binder , J. Jpn. Soc. Powder Powder Metall. , Vol 48 , 2001 , p 3 – 8 10.2497/jjspm.48.3 • Chung C.I. and Cao M.Y. , Solid Polymer Solution Binders for Shaping of Finely-Divided Inert Particles , U.S. Patent 5,665,289...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720293
EISBN: 978-1-62708-305-8
... discontinuities. It is especially useful in the inspection of castings of fairly simple design, for which the signal pattern can be most reliably interpreted. Ultrasonic inspection can also be used to determine the shape of graphite particles in cast iron. Eddy current and other closely related...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220025
EISBN: 978-1-62708-259-4
...-dimensional geometrical shapes. When performing metallographic analysis, one always should keep these transformations in mind. Fig. 3.5 When three-dimensional bodies (top) are sectioned, two-dimensional shapes result (bottom). These two-dimensional shapes supply incomplete information about...
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
... for these simulations. Accordingly, practice largely relies on experimental trial and error. As outlined in Table 7.1 , three common situations arise after powder shaping, categorized as follows: Dewaxing (dewax): Implies removal of a binder added to agglomerate particles for increased strength...
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
... and carbon-powder particles. The shape is then infiltrated with silicon metal; the silicon metal acts to bond the SiC particles together. The properties of the two families of SiC are similar in some ways and quite different in others. Both materials have very high hardness and high thermal...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410133
EISBN: 978-1-62708-265-5
... grain geometry, that of a tetrakaidecahedron (a 14-sided grain shape), Gladman ( Ref 8.24 , 8.26 ) has derived the following equation for the effect of particles on effective grain radius, R 0 : (Eq 8.5) R 0 = [ 1 − ( 4 3 Z ) ] ( r f ) where Z = R/R 0...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610461
EISBN: 978-1-62708-303-4
... be occurring at several locations within the steel, and eventually, a volume of metal will be surrounded by cracks. When this happens, the particle of metal is lost from the surface, and an irregular-shaped cavity, or pit, is left in the surface. At first, the pit has sides perpendicular to the surface...
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
... annealed; L, longitudinal; T, transverse; LT, longitudinal-transverse; TL, transverse-longitudinal; VHP, vacuum hot pressing; ROC, rapid omnidirectional compaction Sieve analysis of Ti-6Al-4V rotating-electrode process powder Table 7.3(a) Sieve analysis of Ti-6Al-4V rotating-electrode process...