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Achieving Ultrahigh Hardness in Electrodeposited Nanograined Ni-Based Binary Alloys
Zheng, Xiangui; Hu, Jian; Li, Jiongxian; Shi, Yinong
2019-04-01
Source PublicationNANOMATERIALS
ISSN2079-4991
Volume9Issue:4
AbstractAnnealing hardening has recently been found in nanograined (ng) metals and alloys, which is ascribed to the promotion of grain boundary (GB) stability through GB relaxation and solute atom GB segregation. Annealing hardening is of great significance in extremely fine ng metals since it allows the hardness to keep increasing with a decreasing grain size which would otherwise be softened. Consequently, to synthesize extremely fine ng metals with a stable structure is crucial in achieving an ultrahigh hardness in ng metals. In the present work, direct current electrodeposition was employed to synthesize extremely fine ng Ni-Mo and Ni-P alloys with a grain size of down to a few nanometers. It is demonstrated that the grain size of the as-synthesized extremely fine ng Ni-Mo and Ni-P alloys can be as small as about 3 nm with a homogeneous structure and chemical composition. Grain size strongly depends upon the content of solute atoms (Mo and P). Most importantly, appropriate annealing induces significant hardening as high as 11 GPa in both ng Ni-Mo and Ni-P alloys, while the peak hardening temperature achieved in ng Ni-Mo is much higher than that in ng Ni-P. Electrodeposition is efficient in the synthesis of ultrahard bulk metals or coatings.
Keywordelectrodeposition nanograined alloy thermal stability annealing hardening hardness
Indexed BySCI
Language英语
WOS IDWOS:000467768800062
PublisherMDPI
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81208
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zheng, Xiangui,Hu, Jian,Li, Jiongxian,et al. Achieving Ultrahigh Hardness in Electrodeposited Nanograined Ni-Based Binary Alloys[J]. NANOMATERIALS,2019,9(4).
APA Zheng, Xiangui,Hu, Jian,Li, Jiongxian,&Shi, Yinong.(2019).Achieving Ultrahigh Hardness in Electrodeposited Nanograined Ni-Based Binary Alloys.NANOMATERIALS,9(4).
MLA Zheng, Xiangui,et al."Achieving Ultrahigh Hardness in Electrodeposited Nanograined Ni-Based Binary Alloys".NANOMATERIALS 9.4(2019).
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