Thermal Expansion

1983 ◽  
pp. 75-132
Author(s):  
A. F. Clark
Keyword(s):  
Thermal Expansion ◽  
Low Temperature ◽  
Specific Heat ◽  
Measurement Techniques ◽  
Short Discussion ◽  
Thermal Expansion Data ◽  
Novel Materials ◽  
Advantages And Disadvantages ◽  
Expansion Theory ◽  
Methods Of Measurement

Abstract Specific heat and thermal expansion are closely related. Following a discussion on thermal expansion theory, methods of measurement techniques are presented along with their advantages and disadvantages. The results of the measurements are then summarized for three classes of materials: metallics, nonmetallics, and composites. Because predicting thermal expansion values for unmeasured or novel materials is useful, the chapter also describes the means of making educated guesses for low-temperature values. A short discussion on how thermal expansion data can be used is followed by a section describing where such data can be found.

Transformation behavior of yttria stabilized tetragonal zirconia polycrystal–TiB2 composites

2001 ◽  
Vol 16 (7) ◽  
pp. 2158-2169 ◽  
Author(s):  
B. Basu ◽  
J. Vleugels ◽  
O. Van Der Biest
Keyword(s):  
Thermal Expansion ◽  
Phase Transformation ◽  
Low Temperature ◽  
Tetragonal Zirconia ◽  
Mechanical Analysis ◽  
Transformation Behavior ◽  
Thermal Expansion Data ◽  
Thermally Induced ◽  
First Time ◽  
Tetragonal Zirconia Polycrystal

The objective of the present article is to study the influence of TiB2 addition on the transformation behavior of yttria stabilized tetragonal zirconia polycrystals (Y-TZP). A range of TZP(Y)–TiB2 composites with different zirconia starting powder grades and TiB2 phase contents (up to 50 vol%) were processed by the hot-pressing route. Thermal expansion data, as obtained by thermo-mechanical analysis were used to assess the ZrO2 phase transformation in the composites. The thermal expansion hysteresis of the transformable ceramics provides information concerning the transformation behavior in the temperature range of the martensitic transformation and the low-temperature degradation. Furthermore, the transformation behavior and susceptibility to low-temperature degradation during thermal cycling were characterized in terms of the overall amount and distribution of the yttria stabilizer, zirconia grain size, possible dissolution of TiB2 phase, and the amount of residual stress generated in the Y-TZP matrix due to the addition of titanium diboride particles. For the first time, it is demonstrated in the present work that the thermally induced phase transformation of tetragonal zirconia in the Y-TZP composites can be controlled by the intentional addition of the monoclinic zirconia particles into the 3Y-TZP matrix.

scholarly journals Thermal Expansion of Fe2MnSi

1988 ◽  
Vol 41 (6) ◽  
pp. 781 ◽  
Author(s):  
JR Miles ◽  
TF Smith ◽  
TR Finlayson
Keyword(s):  
Thermal Expansion ◽  
Curie Temperature ◽  
Specific Heat ◽  
Grüneisen Parameter ◽  
Specific Heat Data ◽  
Thermal Expansion Data ◽  
Narrow Peak ◽  
Temperature Range ◽  
Weak Anomaly ◽  
Heat Data

Measurements of the thermal expansion of FezMnSi in the temperature range 200-300 K are reported. A large, relatively narrow peak is found at the magnetic re-ordering temperature in contrast to a broad, weak anomaly at the Curie temperature. Values for the magnetic Gruneisen parameter 'Y m are derived from the thermal expansion data and previously reported specific heat data following the subtraction of a non-magnetic background.

scholarly journals Thermodynamic Studies and Magnetic Ordering of Ni-Cr Alloys Close to the Critical Composition

1982 ◽  
Vol 35 (3) ◽  
pp. 307 ◽  
Author(s):  
MA Simpson ◽  
TF Smith
Keyword(s):  
Heat Capacity ◽  
Thermal Expansion ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Significant Contribution ◽  
Magnetic Ordering ◽  
Small Contribution ◽  
Thermal Expansion Data ◽  
Ferromagnetic Alloys ◽  
Magnetic Origin

We report measurements of the specific heat capacity and the thermal expansion for Ni-Cr alloys in the vicinity of the magnetic ordering temperature TM and at lower temperatures. No evidence of a contribution due to the magnetic ordering is found in the specific heat capacity and only the indication of a small contribution in the thermal expansion near to T M for an Ni 11 at. % Cr alloy. A significant contribution of magnetic origin is seen for both quantities at lower temperatures. Values for the magnetic Grlineisen parameter yi, are derived from the specific heat capacity and thermal expansion data and compared with values of dIn TM/d In V obtained from direct easurements of dTM/dP. Both yi, and - d In TM/d In V are large and negative for weakly ferromagnetic alloys but differ numerically, whereas for paramagnetic alloys yi, is large and positive.

Low-temperature thermal expansion and specific heat of KBr containing CN

1986 ◽  
Vol 33 (6) ◽  
pp. 4178-4183 ◽  
Author(s):  
J. N. Dobbs ◽  
M. C. Foote ◽  
A. C. Anderson
Keyword(s):  
Thermal Expansion ◽  
Low Temperature ◽  
Specific Heat
Sign in / Sign up

Export Citation Format

Share Document