MECHANISM FOR DUCTILIZATION OF Ni_3Al WITH Pd-DOPING

Acta Metall Sin

1993, Vol. 29

Issue (11): 28-32 DOI:

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MECHANISM FOR DUCTILIZATION OF Ni_3Al WITH Pd-DOPING

MENG Changgong;GUO Jianting;HU Zhuangqi Institute of Metal Research; Academia Sinica; Shenyang

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MENG Changgong;GUO Jianting;HU Zhuangqi Institute of Metal Research; Academia Sinica; Shenyang. MECHANISM FOR DUCTILIZATION OF Ni_3Al WITH Pd-DOPING. Acta Metall Sin, 1993, 29(11): 28-32.

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Abstract The bonding characteristic in Pd doping Ni_3Al was studied by DV-Xα clustermethod, and the mechanism for ductilization of Ni_3Al with Pd-doping was discussed basedon the theoretical model proposed by the authors. The ductilization is related with the in-crease of delocalized bonding electrons caused by Pd-doping. Since Pd-Al bond is strongerthan Pd-Ni bond, the delocalized bonding electrons will increase with the drop of Al content,this implies that hypo-stoichiomcrty in Al is necessary to the ductilization in Ni_3Al.

Key words: Pd Ni_3Al bonding characteristic

Received: 18 November 1993

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1993/V29/I11/28

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