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absolute stability

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Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005209
EISBN: 978-1-62708-187-0
... an overview of interface stability as a function of composition for a given alloy. absolute stability morphological stability plane front solidification solidification silicon single crystals solid-liquid interface instability solute trapping PLANE FRONT SOLIDIFICATION (PFS...
Image
Published: 01 January 2005
Fig. 11 Calculated phase diagram for Na 2 O-SiO 2 showing phases as a function of Na 2 O activity and absolute temperature. The critical boundary for stability of SiO 2 is in the lower portion of the diagram (bold line). Note that SiO 2 (s2) is quartz, and SiO 2 (s4) is tridymite. More
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005226
EISBN: 978-1-62708-187-0
... result for freezing at very high solidification velocity independent of the temperature gradient. This is called absolute stability. Potentially unstable wavelengths of the perturbed interface shape become very small, inducing large curvatures where the Gibbs-Thomson effect stabilizes a planar interface...
Book Chapter

By Rob Bosman
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006381
EISBN: 978-1-62708-192-4
... thickeners and had limited oxidational stability, which limited their application. While much progress has been made concerning the formulation of lubricating greases, the general formulation of 90% of the applied greases remains the same; a thickener (typically a soap) with a concentration...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003735
EISBN: 978-1-62708-177-1
.../0001-6160(68)90144-2 9. Perepezko J.H. , Growth Kinetics and Mechanism of the Massive Transformation , Metall. Trans. A , Vol 15 , 1984 , p 437 – 447 10.1007/BF02644967 10. Lima M. and Kurz W. , Massive Transformation and Absolute Stability , Metall. Mater...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005749
EISBN: 978-1-62708-171-9
... (absolute) psig pounds per square inch, gage pressure (pressure relative to ambient pressure) PSZ partially stabilized zirconia PTA plasma-transferred arc PUR polyurethane PVC polyvinyl chloride PVD physical vapor deposition Q thermal energy generated per unit...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001409
EISBN: 978-1-62708-173-3
.... These include: Group I alloys, which are the standard ferritic stainless steels; Group II alloys, which are modified versions of the standard alloys; and Group III alloys, which contain very low interstitial element (carbon, nitrogen, and oxygen) contents or stabilizing elements for improved corrosion...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003085
EISBN: 978-1-62708-199-3
...: the strict sense normally used by physical scientists and the somewhat less strict sense normally used by materials engineers. In the strictest sense, homogeneous means that the physical properties throughout the region of space occupied by the phase are absolutely identical, and any change in condition...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006411
EISBN: 978-1-62708-192-4
...). Ester lubricants primarily comtain diesters silicate ester, polyglycol ester ( Ref 2 ), fluoro ester, neopentyl-polyol ester ( Ref 3 ), and aliphatic ester ( Ref 4 ). Due to their high thermal stability and oxidation resistance, they are mainly used as hydraulic fluid in the aircraft and gasturbine...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005210
EISBN: 978-1-62708-187-0
... and grows, latent heat and solute are rejected into the liquid so that negative temperature and concentration gradients are present in the liquid at the solid/liquid interface. As discussed by Kurz in the previous article, “Plane Front Solidification,” in this Volume, the stability of the interface at low...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006401
EISBN: 978-1-62708-192-4
... of friction (μ) as a function of a dimensionless parameter, H , such that: (Eq 4) H = η ω p where η is the absolute viscosity (expressed in units of pressure-time, Pa × s), ω is the rotational speed (rev/s), and p is the pressure (in units of Pa). The parameter H is known as the Hersey...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005597
EISBN: 978-1-62708-174-0
... it an ion, or an electrically charged gas atom. All other factors held constant, the value of the ionization potential decreases as the molecular weight of the gas increases. Arc starting and arc stability are greatly influenced by the ionization potentials of the component shielding gases used...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001340
EISBN: 978-1-62708-173-3
... a gas atom—making it an ion, or an electrically charged gas atom. All other factors held constant, the value of the ionization potential decreases as the molecular weight of the gas increases. Arc starting and arc stability are greatly influenced by the ionization potentials of the component shielding...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006673
EISBN: 978-1-62708-213-6
... of temperature or time in a controlled atmosphere. The weight of the evaluated material can decrease due to volatilization or decomposition or increase because of gas absorption or chemical reaction. Thermogravimetric analysis can provide valuable information regarding the composition and thermal stability...
Series: ASM Handbook
Volume: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006223
EISBN: 978-1-62708-163-4
... Law of Thermodynamics, and the Third Law of Thermodynamics. It informs that for transformations that occur at a constant temperature and pressure, the relative stability of the system is determined by its Gibbs free energy. The article describes the Gibbs free energy of a single-component unary system...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006362
EISBN: 978-1-62708-192-4
... with a compressible gas. The article also describes the different types of aerostatic bearings, such as annular thrust bearings and orifice-compensated journal bearings. It presents a discussion on load capacity and stiffness, friction and power loss, and stability and damping of the aerostatic bearings. The article...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003580
EISBN: 978-1-62708-182-5
... concentration of the element or for a given ratio of activities of two dissolved species of the element give E -pH lines. The representation of the equilibrium pHs for acid-base reactions (independent of the potential) gives vertical lines. All those lines delimit E -pH domains of stability for the various...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002396
EISBN: 978-1-62708-193-1
... strengthening Thermomechanical processing Selective service processing Fatigue resistance is evaluated in terms of: Cyclic stability Resistance to crack initiation and propagation Notch sensitivity General Trends in Cyclic Behavior In this section, the spectrum of properties...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003023
EISBN: 978-1-62708-200-6
... temperature but over a range of temperatures. Thus, the T g specified for a polymer actually represents roughly the center of a transition region. In a thermoplastic polymer, for example, the change that occurs gradually over the T g region eventually leads to a complete loss of dimensional stability...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005205
EISBN: 978-1-62708-187-0
.... With argon as the plasma gas, the service life of the cathode in the tungsten tip design is typically between 30 and 150 h. The inert gas consumption and plasma column stabilization of such torches are low. The hollow copper electrode design is shown in Fig. 4 . The electrode material, usually copper...