TY - JOUR
T1 - Improved microyield strength in beryllium produced by vapor deposition
AU - Nieh, T. G.
AU - Wadsworth, J.
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 1998/2/13
Y1 - 1998/2/13
N2 - Thick Be deposits were produced by vapor deposition at a substrate temperature of 400°C. Deposits were prepared from both stationary and rotating substrates. In the case of a stationary substrate, the microstructure of the deposit consisted of columnar grains with their major axis parallel to the direction of incidence of the depositing atoms. By contrast, a rotating substrate produced deposits with a microstructure consisting of helical columnar grains. This helical grained structure results in a significant improvement in microyield strength; the microyield strengths for deposits produced from stationary and rotating substrates are 57.3 and 213.5 MPa, respectively. The improved microyield strength is proposed to be a result of the presence of geometrically necessary dislocations in the deposit produced from a rotating substrate.
AB - Thick Be deposits were produced by vapor deposition at a substrate temperature of 400°C. Deposits were prepared from both stationary and rotating substrates. In the case of a stationary substrate, the microstructure of the deposit consisted of columnar grains with their major axis parallel to the direction of incidence of the depositing atoms. By contrast, a rotating substrate produced deposits with a microstructure consisting of helical columnar grains. This helical grained structure results in a significant improvement in microyield strength; the microyield strengths for deposits produced from stationary and rotating substrates are 57.3 and 213.5 MPa, respectively. The improved microyield strength is proposed to be a result of the presence of geometrically necessary dislocations in the deposit produced from a rotating substrate.
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U2 - 10.1016/S1359-6462(97)00572-1
DO - 10.1016/S1359-6462(97)00572-1
M3 - RGC 21 - Publication in refereed journal
SN - 1359-6462
VL - 38
SP - 863
EP - 868
JO - Scripta Materialia
JF - Scripta Materialia
IS - 6
ER -