The United States of America as Represented by the Administrator of National Aeronautics and Space Administration
发明人:
Goldsby Jon
申请号：
US201514633467
公开号：
US9725821(B1)
申请日:
2015.02.27
申请国别(地区):
美国
年份:
2017
代理人:
Earp, III Robert H.
摘要：
A pull rod for use in producing a single crystal from a molten alloy is provided that includes an elongated rod having a first end and a second end, a first cavity defined at the first end and a second cavity defined at the first end and in communication with the first cavity. The first cavity receives the molten alloy and the second cavity vents a gas from the molten alloy to thereby template a single crystal when the pull rod is dipped into and extracted from the molten alloy.
