Intragranular Porous Aluminum Titanate Ceramics with Low Thermal Expansion and High Strength Simultaneously

2010 ◽  
Vol 156-157 ◽  
pp. 1713-1716
Author(s):  
Gang Xu ◽  
Wan Bo He ◽  
Yi Qiang Li ◽  
Yong Gang Wang ◽  
Gao Rong Han
Keyword(s):  
Mechanical Property ◽  
Thermal Expansion ◽  
High Strength ◽  
Graphite Powder ◽  
Aluminum Titanate ◽  
Dilatometric Curve ◽  
Porous Aluminum ◽  
Low Thermal Expansion ◽  
Expansion Behavior ◽  
Titanate Ceramics

Intragranular porous aluminum titanate ceramics were prepared by using graphite powder as pore-forming agent and magnesium-doped aluminum titanate powder as starting material. FESEM was employed to observe the microstructure. In order to investigate the expansion behavior and mechanical property, the dilatometric curve and three-point flexural strength of the prepared aluminum titanate ceramics were measured respectively. The results demonstrate that because of the formation of the intragranular pores, the aluminum titanate ceramics are of low thermal expansion and high strength simultaneously.

Acoustic emission studies of low thermal expansion aluminum-titanate ceramics strengthened by compounding mullite

2007 ◽  
Vol 33 (5) ◽  
pp. 879-882 ◽  
Author(s):  
Teruaki Ono ◽  
Yosuke Sawai ◽  
Masayuki Ikimi ◽  
Seizo Obata ◽  
Osamu Sakurada ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Thermal Expansion ◽  
Aluminum Titanate ◽  
Low Thermal Expansion ◽  
Titanate Ceramics ◽  
Emission Studies

Description of the PM Process by Using Ishikawa-Analysis

2013 ◽  
Vol 752 ◽  
pp. 48-56
Author(s):  
Andrea Simon ◽  
Károly Kovács ◽  
C. Hakan Gür ◽  
Tadeusz Pieczonka ◽  
Zoltán Gácsi
Keyword(s):  
Thermal Conductivity ◽  
Thermal Expansion ◽  
Powder Metallurgy ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
High Strength ◽  
Manufacturing Technology ◽  
Low Density ◽  
Composite Manufacturing ◽  
Low Thermal Expansion

Composites are special material which can provide individual properties such as high strength with low density or good thermal conductivity with low thermal expansion coefficient. Composites conform to the constantly evolving and more complex expectations. In order to make a product with good quality, it is important to choose suitable materials and technology. In this research powder metallurgy (PM), as one of the most common composite manufacturing technology, was examined -which factors and mechanisms influence mostly the properties of the product. Ishikawa method was used to reveal these correlations.

Some recent developments in high-strength glasses and ceramics

1964 ◽  
Vol 282 (1388) ◽  
pp. 52-56
Keyword(s):  
Thermal Expansion ◽  
Bending Strength ◽  
Glass Ceramics ◽  
High Strength ◽  
Fine Grained ◽  
Thermal Expansion Coefficients ◽  
Low Thermal Expansion ◽  
Recent Developments ◽  
Expansion Coefficients ◽  
Mechanical Strengths

Two areas of development in the field of glasses and ceramics have produced new materials with unusual combinations of properties. Glass-ceramics are melted and formed as glasses by conventional glass-forming techniques, but by a subsequent heat treatment, they are converted to fine-grained crystalline structures with new and useful combinations of properties. Products with thermal expansion coefficients approaching zero and flexural strengths ranging from 10 000 to 50 000 Lb./in. 2 have been made though not all combinations of low thermal expansion coefficients and high mechanical strengths are possible. The second area of development is in so-called Chemcor glasses. Such glass products can be preferentially pre-stressed by chemical means so as to produce an outer layer with high compressive stress and a bending strength in the finished product up to 100 000 Lb/in. 2 .

Simultaneous fabrication of a composite with low thermal expansion and high strength in the eucryptite — yttria-stabilized PSZ system

1996 ◽  
Vol 31 (14) ◽  
pp. 3691-3695 ◽  
Author(s):  
T. Shimada ◽  
M. Mizuno ◽  
K. Kurachi ◽  
N. Kato ◽  
O. Sakurada ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
High Strength ◽  
Low Thermal Expansion

EFFECT OF HIGH TEMPERATURE DEFORMATION ON THE LOW THERMAL EXPANSION BEHAVIOR OF FE-29%NI-17%CO ALLOY

2008 ◽  
Vol 22 (31n32) ◽  
pp. 6016-6021 ◽  
Author(s):  
K. A. LEE ◽  
J. NAMKUNG ◽  
M. C. KIM
Keyword(s):  
Thermal Expansion ◽  
High Temperature ◽  
Strain Rate ◽  
Strain Rate Range ◽  
Theoretical Explanation ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Thermal Expansion Behavior ◽  
Low Thermal Expansion ◽  
Expansion Behavior

The effect of high temperature deformation on the low thermal expansion property of Fe -29 Ni -17 Co alloy was investigated in the compressive temperature range of 900~1300°C at a strain rate range of 25 ~ 0.01 sec. -1. The thermal expansion coefficient (α30~400) generally increased with increasing compressive temperature. In particular, α30~400 increased remarkably as the strain rate decreased at temperatures above 1100°C. Note, however, that α30~400 at low compressive temperatures (900°C and 1000°C) increased abnormally at high strain rates. Based on the investigation of various possibilities of change in low thermal expansion behavior, the experimental results indicated that both the appearance of the α phase and evolution of grain size due to hot compression clearly influenced the low thermal expansion behavior of this invar-type alloy. The correlation between the microstructural cause and invar phenomena and theoretical explanation for the low thermal expansion behavior of Fe -29% Ni -17% Co were also suggested.

Phase transition, crystal water and low thermal expansion behavior of Al2−2x(ZrMg)xW3O12·n(H2O)

2014 ◽  
Vol 218 ◽  
pp. 15-22 ◽  
Author(s):  
Fang Li ◽  
Xiansheng Liu ◽  
Wenbo Song ◽  
Baohe Yuan ◽  
Yongguang Cheng ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Expansion ◽  
Crystal Water ◽  
Thermal Expansion Behavior ◽  
Low Thermal Expansion ◽  
Expansion Behavior
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