The Constant Stress Thermal/mechanical Properties of Subeutectoid Aged MgO-partially Stabilized Zirconia PDF Download
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Author: Rickey James Seyler
Publisher:
ISBN:
Category :
Languages : en
Pages : 666
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Book Description
Author: Rickey James Seyler
Publisher:
ISBN:
Category :
Languages : en
Pages : 666
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Book Description
Author:
Publisher:
ISBN:
Category : Ceramic materials
Languages : en
Pages : 660
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Author:
Publisher:
ISBN:
Category : Physics
Languages : en
Pages : 1354
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Author:
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ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 532
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Author: Peter Glenn Valentine
Publisher:
ISBN:
Category :
Languages : en
Pages : 86
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Author: Timothy John Hine
Publisher:
ISBN:
Category : Diesel motor
Languages : en
Pages : 162
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Book Description
The fatigue behavior of several commercially-available MgO partially stabilized zirconias (Mg-PSZ) was studied by measuring the strength as a function of time, temperature, and applied stress level. The two Mg-PSZ types included TS PSZ (thermal shock grade) and MS PSZ (maximum strength/grade/1983 vintage). Both 1983 and 1984 vintages of the TS PSZ (designated TS(83) and TS(84)) were examined. The strength was determined using an interrupted fatigue (I.F.) test in which flexure samples were exposed at temperatures between 500 and 1000C̊ for times up to 1000 h. During testing, the applied stress was maintained at a percentage of the short-term [strength] value measured at the same [temperature]. Specific stress levels included 0, 60, 70, and 80%. The following techniques were used to characterize both the as-received and tested I.F. specimens: (1) SEM, (2) TEM, (3) optical microscopy, (4) x-ray diffraction, (5) micro-Raman spectroscopy, and (6) dilatometry ... The I.F. results indicated that the application of the Mg-PSZ ceramics as high-temperature components should be limited to temperatures of 800C̊ and below particularly when substantial mechanical stresses are involved. Although the strength of the TS and MS PSZ materials tested at 1000C̊ under a no-load condition was relatively insensitive to time, the observed phase instability could lead to mechanical failure in applications involving thermal cycling.
Author: Douglas Lloyd Porter
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Category : Dissertations, Academic
Languages : en
Pages : 1252
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Author: John B. Wachtman
Publisher: John Wiley & Sons
ISBN: 9780470451502
Category : Technology & Engineering
Languages : en
Pages : 496
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Book Description
A Comprehensive and Self-Contained Treatment of the Theory and Practical Applications of Ceramic Materials When failure occurs in ceramic materials, it is often catastrophic, instantaneous, and total. Now in its Second Edition, this important book arms readers with a thorough and accurate understanding of the causes of these failures and how to design ceramics for failure avoidance. It systematically covers: Stress and strain Types of mechanical behavior Strength of defect-free solids Linear elastic fracture mechanics Measurements of elasticity, strength, and fracture toughness Subcritical crack propagation Toughening mechanisms in ceramics Effects of microstructure on toughness and strength Cyclic fatigue of ceramics Thermal stress and thermal shock in ceramics Fractography Dislocation and plastic deformation in ceramics Creep and superplasticity of ceramics Creep rupture at high temperatures and safe life design Hardness and wear And more While maintaining the first edition's reputation for being an indispensable professional resource, this new edition has been updated with sketches, explanations, figures, tables, summaries, and problem sets to make it more student-friendly as a textbook in undergraduate and graduate courses on the mechanical properties of ceramics.
Author: A. Parmaliana
Publisher: Elsevier
ISBN: 0080537308
Category : Technology & Engineering
Languages : en
Pages : 1005
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Book Description
On January 1988, the ascertained and economically accessible reserves of Natural Gas (NG) amounted to over 144,000 billion cubic meters worldwide, corresponding to 124 billion tons of oil equivalents (comparable with the liquid oil reserves, which are estimated to be 138 billion TOE). It is hypothesized that the volume of NG reserve will continue to grow at the same rate of the last decade. Forecasts on production indicate a potential increase from about 2,000 billion cubic meters in 1990 to not more than 3,300 billion cubic meters in 2010, even in a high economic development scenario. NG consumption represents only one half of oil: 1.9 billion TOE/y as compared to 3.5 of oil. Consequently, in the future gas will exceed oil as a carbon atom source. In the future the potential for getting energetic vectors or petrochemicals from NG will continue to grow.The topics covered in Natural Gas Conversion V reflect the large global R&D effort to look for new and economic ways of NG exploitation. These range from the direct conversion of methane and light paraffins to the indirect conversion through synthesis gas to fuels and chemicals. Particularly underlined and visible are the technologies already commercially viable.These proceedings prove that mature and technologically feasible processes for natural gas conversion are already available and that new and improved catalytic approaches are currently developing, the validity and feasibility of which will soon be documented. This is an exciting area of modern catalysis, which will certainly open novel and rewarding perspectives for the chemical, energy and petrochemical industries.
