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Simultaneous Improvement of Ductility and Strength by Minute Doping in Ultrafine Grained Au Wires-Experiment and First Principle Study

Published online by Cambridge University Press:  01 February 2011

Yeong Huey Effie Chew ,
Chee Cheong Wong ,
Cristiano Ferraris  and
Hui Hui Kim
Yeong Huey Effie Chew
Affiliation:
[email protected], Kulicke & Soffa, Research & development, Kulicke & Soffa (S. E. A.) Pte Ltd, Block 5002, Ang Mo Kio, Avenue 5, #04-05 TECHplace II, Singapore, AL, 569871, Singapore
Chee Cheong Wong
Affiliation:
[email protected], Nanyang Technological University, Singapore, 569871, Singapore
Cristiano Ferraris
Affiliation:
[email protected], Nanyang Technological University, Singapore, 569871, Singapore
Hui Hui Kim
Affiliation:
[email protected], Insitute of Materials Research, Singapore, 569871, Singapore
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Abstract

Achieving both high strength and ductility is a common goal in the design of fine-grained materials. Here we report that with only ppm level of calcium doping, ductility and strength in ultrafine-grained gold wires can be concurrently improved by 108% and 65% respectively. Preferential segregation of calcium to stacking faults and grain boundaries in gold has reduced stacking fault energy of the system effectively, as shown by TEM and first principle simulation study. Through the modification of stacking fault energy, one can simultaneously increases the strength and ductility of a system.

Keywords

dopantductilitystrength
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1086: Symposium U – Mechanics of Nanoscale Materials , 2008 , 1086-U09-03
Copyright
Copyright © Materials Research Society 2008

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