期刊
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
卷 43A, 期 10, 页码 3532-3538出版社
SPRINGER
DOI: 10.1007/s11661-012-1172-y
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资金
- MRSEC program of the National Science Foundation [DMR-0520425]
- National Science Foundation Research Experience for Undergraduates Site grant [DMR-1005076]
- U.S. DOE Office of Basic Energy Science grant in the Electron and Scanning Probe Microscopies Program [DE-FG02-08ER46548]
The grain boundary character distribution and the relative grain boundary energy of 100 ppm Ca-doped yttria were measured before and after a previously identified grain boundary complexion transition. The grain boundary character distribution of samples exhibiting normal grain growth (before the complexion transition) favored {111} planes, whereas those exhibiting abnormal grain growth (after the complexion transition) favored {001} planes. Additionally, the relative grain boundary-to-surface energy ratios in the sample exhibiting abnormal grain growth were 33 pct lower than in the sample exhibiting normal grain growth. The results also indicate that the complexion transition increased the anisotropy of the grain boundary energy, and this may be responsible for the increase in the anisotropy of the grain boundary character distribution.
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