Wetting of Reactor Steels by a PbBi Eutectic Melt with Lithium

The Seebeck coefficient, εT, of the thermocell Ag(T)/AgNO3 in NaNO3 − KNO3/Ag (T + ΔT) was measured as a function of silver nitrate concentration and temperature. Extrapolation of the results to unit mole fraction, N, of AgNO3 gave the value εT0 = − 277.5 − 0.136T °C (µV deg−1).For several mixed melts of AgNO3 and an alkali nitrate the function [Formula: see text] was calculated and shown to be linear in N. P was extrapolated to finite values for the pure alkali nitrates.

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Verification of Warm Prestressing Effect Under a Pressurized Thermal Shock (PTS) Event

Journal of Pressure Vessel Technology ◽

10.1115/1.2929586 ◽

1994 ◽

Vol 116 (3) ◽

pp. 267-273 ◽

Cited By ~ 6

Author(s):

H. Okamura ◽

G. Yagawa ◽

T. Hidaka ◽

Y. Urabe ◽

M. Satoh ◽

...

Keyword(s):

Vessel Wall ◽

Irradiation Embrittlement ◽

Predictive Equations ◽

Warm Prestressing ◽

Pressurized Thermal Shock ◽

Reactor Steels ◽

Fracture Tests ◽

Integrity Analysis ◽

Temperature Margin ◽

Reactor Pressure

Fracture tests for the verification of WPS (warm prestressing) effect were carried out by using large flat specimens and big compact specimens with low toughness. In the case of monotonical KI increasing during cooling, the specimen broke within the scatter band of KIC. On the other hand, when KI was decreasing during cooling, the specimens did not break even if KI values were beyond the scatter band of KIC. That is, WPS effect was confirmed even for the low toughness steel like reactor pressure vessel wall under neutron irradiation. Also, KI values at fracture can be predicted by Chell’s theory. By applying WPS effect and the predictive equations for irradiation embrittlement for Japanese PWR reactor steels to the PTS integrity analysis, much more temperature margin can be expected.

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Abnormal dynamic behavior and structural origin of Cu-Ag eutectic melt

Acta Materialia ◽

10.1016/j.actamat.2021.116705 ◽

2021 ◽

Vol 207 ◽

pp. 116705

Author(s):

B.Q. Wu ◽

L.T. Kong ◽

J.F. Li

Keyword(s):

Dynamic Behavior ◽

Eutectic Melt

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Eutectic Bonding of Copper to Ceramics

MRS Proceedings ◽

10.1557/proc-40-393 ◽

1984 ◽

Vol 40 ◽

Cited By ~ 12

Author(s):

Marc Wittmer

Keyword(s):

Bond Strength ◽

Electronic Packaging ◽

Mechanical Engineering ◽

Oxide Ceramics ◽

Strong Bond ◽

Eutectic Bonding ◽

Eutectic Melt

AbstractEutectic bonding of copper to ceramics makes use of a liquid eutectic between copper and oxygen at 1065°C which wets oxide ceramics very well. Upon solidification of the eutectic melt a very strong bond is established which has a strength of about 5×107N/m2. The excellent bond strength gives this technique important applications in electronic packaging and mechanical engineering.

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