GAS DENSITIES IN HELIUM BUBBLES IN NICKEL MEASURED BY SMALL-ANGLE NEUTRON-SCATTERING

被引：16

作者：

LI, Q ^{[1
]}

KESTERNICH, W ^{[1
]}

SCHROEDER, H ^{[1
]}

SCHWAHN, D ^{[1
]}

ULLMAIER, H ^{[1
]}

机构：

[1] FORSCHUNGSZENTRUM JULICH, FORSCH ZENT JULICH, INST FESTKORPERFORSCH, W-5170 JULICH 1, GERMANY

来源：

ACTA METALLURGICA ET MATERIALIA | 1990年 / 38卷 / 12期

关键词：

D O I：

10.1016/0956-7151(90)90251-B

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Neutron small angle scattering (SANS) combined with transmission electron microscopy (TEM) has been applied to obtain detailed information on the bubble structure in Ni, implanted with 1200 appm helium at room temperature and annealed at temperatures up to 1173 K. Besides conventional information such as size distributions of "small" bubbles in the bulk and "large" bubbles near grain boundaries, the density of helium in the bubbles could directly be determined by a contrast variation method of SANS. The most important result is the finding that even after the highest annealing temperature of 1173 K (almost-equal-to-70% of the melting temperature), the bubbles contain an overpressure which lies about 3 GPa above the value for thermodynamic equilibrium.

引用

页码：2383 / 2392

页数：10

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