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mixture homogeneity

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Published: 30 April 2020
Fig. 5.2 The idea of mixture homogeneity and scale of scrutiny is illustrated by this mixture of red and green candies. The apparent uniformity of repeated samples depends on the sample size tested. More
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290085
EISBN: 978-1-62708-319-5
... Abstract This chapter is a detailed account of various attributes related to mixing and testing of powder-binder feedstocks. Mixing parameters and their effects on feedstock properties is discussed. The attributes reviewed include mixture homogeneity, wetting, powder-binder ratio, feedstock...
Image
Published: 30 April 2020
Fig. 5.3 Plot of homogeneity versus sample size, or scale of scrutiny, for the mixture shown in Fig. 5.2 . The apparent homogeneity improves as the sample size increases. More
Image
Published: 30 April 2020
Fig. 5.9 Mixing torque as a function of the mixing time, where progressive solids additions are made to the mix. At each point where cold powder is added to the mixture, the mixing torque makes a jump and then settles to a lower steady-state value associated with heating and homogenization More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140107
EISBN: 978-1-62708-264-8
..., and minimization of austenite grain growth. Homogenization Homogenization with respect to carbon and the alloying elements occurs by the process of diffusion, as discussed in Chapter 7 . Consider first the homogenization of carbon. The homogenization of a ferrite-cementite mixture into austenite occurs...
Image
Published: 01 March 2012
Fig. 6.10 Start of the peritectic transformation in the same directionally-solidified Cu-20Sn alloy shown in Fig. 6.9 , but at higher magnification. Note the homogeneous thickness of the β layers (gray) around the primary α (white). The matrix (dark) is a mixture of tin-rich phases. Original More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260119
EISBN: 978-1-62708-336-2
... homogenization, and the cause of casting defects, including cracking and splitting, segregation, porosity, and grain growth. aluminum alloys billets casting casting defects The extrusion process consists of four major components, hydraulic press, die, tooling, and billet casting. In the previous...
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
... to produce porous sintered parts that have a pleasing surface texture and to assure adequate mechanical properties. Also, many powders are mixtures of several components that alloy with each other during sintering by solid-state diffusion. In the presence of large particles, the sintering times...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430017
EISBN: 978-1-62708-253-2
.... A boiler is a rectangular furnace typically about 15 m (50 ft.) on a side and 40 m (130 ft.) tall. Its walls are lined with a network or web of HP steel tubes known as waterwalls or waterwall tubes, filled with water and about 55 to 65 mm (2 to 2.5 in.) in diameter. The pulverized coal-hot air mixture...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240053
EISBN: 978-1-62708-251-8
... nuclei in the freezing melt and their subsequent growth is known as a nucleation and growth process. Fig. 4.4 Nucleation and growth during solidification Nucleation can occur by either homogeneous or heterogeneous nucleation. Homogeneous nucleation occurs when nucleation takes place...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420001
EISBN: 978-1-62708-310-2
... and arrangement of elements in a material of a given chemical composition. A phase is a physically homogeneous state of matter with a given chemical composition and structure. The simplest examples are the three states of matter (solid, liquid, or gas) of a pure metal. The three phases of a pure metal have...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420171
EISBN: 978-1-62708-310-2
... also form by a continuous ordering mechanism, where local atomic rearrangements occur homogeneously throughout the disordered phase, creating ordered domains. As the temperature is decreased further, the ordered domains will grow until they impinge on or intersect each other and form antiphase...
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
..., this is a book about how things are made. Today (2020), engineers employ a wide range of forming options, such as machining and casting. In the second half of the 20th century, new processes emerged for shaping plastics. Subsequently, those ideas extended to include powder-binder mixtures, projecting plastic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420041
EISBN: 978-1-62708-310-2
... free energy of a two-phase mixture (α + β). Adapted from Ref 3.1 Consider now alloy X o in Fig. 3.21(a) . If the atoms are arranged as a homogeneous phase, the free energy will be lowest as α; that is, G 0α per mole. However, from the above it is clear that the system can lower its free...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290261
EISBN: 978-1-62708-319-5
.... It is a subset of powder injection molding (PIM). mixing. The thorough intermingling of powders of two or more different compositions. It is also used to describe the compounding of feedstock by the thorough distribution of binders between particles. A homogeneous mixture has uniform distribution of binder...
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: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430001
EISBN: 978-1-62708-253-2
... mixture is introduced into the furnace from the four corners of the furnace, tangentially. Wall-fired boilers: Multiple burners are located along a single wall or on opposite walls of the furnace. Cyclone-fired boilers: The air-fuel mixture is burned in horizontal cylinders. Stoker-fired boilers...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240075
EISBN: 978-1-62708-251-8
...-state reactions intermediate phases ternary phase diagrams binary phase diagrams A PHASE is a homogeneous, physically distinct region of a material that differs in structure and/or composition from another region. A phase may be a single chemical substance or a mixture of two or more substances...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420015
EISBN: 978-1-62708-310-2
... other states of matter; that is, the liquid and vapor states. Consider a metal specimen in the solid state that consists of 50% iron atoms and 50% copper atoms ( Fig. 2.1a ). These atoms do not form a homogeneous solid under equilibrium conditions; rather, they form two different solids, one rich...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1996
DOI: 10.31399/asm.tb.phtpclas.t64560003
EISBN: 978-1-62708-353-9
..., 0.025 wt.% maximum. Relatively soft. Iron carbide Iron-carbon compound, Fe 3 C. Unstable phase, will decompose to iron and graphite, but takes a relatively long time and thus is a common phase in steels. Very hard. Cementite Iron carbide. Pearlite Two phase mixture of ferrite and iron...