High-temperature creep properties of uranium dioxide pellet

2010 ◽  
Vol 20 (2) ◽  
pp. 238-242 ◽  
Author(s):  
Jia-cheng GAO ◽  
Liang-fen WANG ◽  
Yong WANG ◽  
Shu-fang WU
Keyword(s):  
High Temperature ◽  
Uranium Dioxide ◽  
High Temperature Creep ◽  
Creep Properties ◽  
Temperature Creep

High Temperature Creep Properties of UO2 Fuel Pellets Manufactured by Low Temperature Sintering Technology

2013 ◽  
Author(s):  
Rui Li ◽  
Yuemin Zhou
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Low Temperature ◽  
Uranium Dioxide ◽  
Nitrogen Atmosphere ◽  
Creep Process ◽  
Low Temperature Sintering ◽  
High Temperature Creep ◽  
Creep Properties ◽  
Temperature Creep

In this paper, the low temperature sintering technology to UO2 pellets has been introduced, and we have studied the high temperature creep properties of the pellets which manufactured by low temperature sintering. The sintering temperatures are 1073K, 1273K, 1473K and 1673K, sintering time are 1 hour, 2 hours and 3 hours respectively. We obtained the highest sintering density of pellets at 1673K with 3 hours, which is 10.41g/cm3 (94.98% theoretical density). The grain size of pellets which prepared by low temperature sintering technology and traditional technology are 9.0μm and 23.8μm respectively. So the high temperature creep properties of the two kinds of pellet must be studied. They were performed at 20–50 MPa, 1673K and 1773K respectively, under a nitrogen atmosphere to shorten the experimental time. According to the results, the creep rates of sintered UO2 with the grain sizes of 9.0μm and 23.8μm under the load of 10MPa are almost the same. The creep process is controlled by both Nabarro-Herring creep and Hamper-Dorn creep for uranium dioxide with grain size of 9.0μm; while Hamper-Dorn creep is the dominant mechanism for uranium dioxide with grain size of 23.8μm.

High-temperature creep properties of NIFS-HEAT-2 high-purity low-activation vanadium alloy

2019 ◽  
Vol 59 (9) ◽  
pp. 096046 ◽  
Author(s):  
T. Nagasaka ◽  
T. Muroga ◽  
T. Tanaka ◽  
A. Sagara ◽  
K. Fukumoto ◽  
...  
Keyword(s):  
High Temperature ◽  
High Purity ◽  
High Temperature Creep ◽  
Vanadium Alloy ◽  
Creep Properties ◽  
Temperature Creep

scholarly journals Effects of B and Zr on High Temperature Creep Properties of a Ni-20Cr Alloy

1986 ◽  
Vol 72 (9) ◽  
pp. 1359-1366 ◽  
Author(s):  
Masao TAKEYAMA ◽  
Tohru MIURA ◽  
Takashi MATSUO ◽  
Makoto KIKUCHI ◽  
Ryohei TANAKA
Keyword(s):  
High Temperature ◽  
High Temperature Creep ◽  
Creep Properties ◽  
Temperature Creep

scholarly journals High Temperature Creep Properties of Sialon Ceramics (2).

1995 ◽  
Vol 42 (4) ◽  
pp. 453-457
Author(s):  
Tatsuya Shiogai ◽  
Yoshihiro Asai ◽  
Norikazu Sashida ◽  
Kazuyoshi Minamisawa ◽  
Noboru Miyata ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Creep ◽  
Creep Properties ◽  
Temperature Creep

A Review of Rafting in Nickel-Based Single Crystal Superalloys

2017 ◽  
Vol 263 ◽  
pp. 41-49
Author(s):  
Zhi Yuan Yu ◽  
Zhu Feng Yue ◽  
Wei Cao ◽  
Xin Mei Wang
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Single Crystal ◽  
Numerical Simulations ◽  
Critical Review ◽  
High Temperature Creep ◽  
Major Work ◽  
Creep Properties ◽  
Temperature Creep ◽  
Directional Coarsening

Nickel-based single crystal superalloys have been widely used in modern aircraft, which is related to its high temperature mechanical strength and creep properties. And the initial cubic γ′ precipitates start to coarsen directionally during high temperature creep, which results in the degradation of the mechanical properties, especially the creep properties. Therefore, it is essential to figure out the mechanism of directional coarsening during the period of high temperature creep. In this article, a broad review of rafting mechanism of nickel-based single crystal superalloys is provided. The major work of this critical review is to introduce several experiments and numerical simulations which are used to analyze the evolution of rafting. For three different numerical simulations, their performance, advantage and disadvantage are discussed in detail. Through methods above, the effect on creep properties is summarized.

Sign in / Sign up

Export Citation Format

Share Document