Oil-Retention and Oil-Bearing Tribological Properties of Nanoporous Copper Prepared Using a Chemical Dealloying Method
, Jiahao Zhao 1, Hao Wang 1, Honglin Li 1, Guanchao Yin 4, Meirong Cai 5, Yangwei Wang 6 and Qiang Shen 1Round 1
Reviewer 1 Report
The author investigated the oil-retention and oil-bearing tribological properties of nanoporous copper prepared by a chemical dealloying method. The presented results are interesting. I have some comments and suggestions to improve the quality of the current work as below:
1. In addition to the use of Archimedes method, the porosity of the prepared samples should be measured and evaluated by BET and image analysis to confirm data.
2. EDS diagram of the prepared samples should be presented along with EDS mapping.
3. Please explain why the dry and oil-bearing friction coefficient of the samples with different porosity (and wear volume) is nearly the same. What is the impact of oil in reducing the friction and wear volume?
4. Wear mechanisms for all samples was not proposed. EDS should be conducted at wear track to explain the wear mechanisms.
English language fine.
Author Response
Please see the attachment
Author Response File: 
Author Response.pdf
Reviewer 2 Report
Major
1)Figures 6.1 and 8 show the same data. This is probably a mistake. Please check and resubmit the data, as I think it is the most important data in this paper.
2)P1,L35
“High speed operation will lead to insufficient lubrication”→Is that right? Considering the Stribeck curve, the transition from boundary lubrication to mixed lubrication and then to fluid lubrication as speed increases can be interpreted as indicating that the lubricant film is stable on the sliding surface as speed increases. Please express this in a way that is consistent with mentioned above.
3)P2, L54, 55
There is a description of “The actual contact area・・・in the stress distribution”, but I am not sure of the causal relationship between these. Please describe more precisely. Why does a smaller area of true contact affect the stress distribution?
Minor
1)Figures 6 and 8 are too small to read. Please make them more legible.
2)Please include a brief explanation of the meaning of　“ Dealloynig”.
Author Response
Please see the attachment
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
Accepted
Reviewer 2 Report
The content of the paper is appropriate for this journal and contains findings of engineering significance. In addition, the paper has been appropriately revised in response to the points raised by the reviewers, and is therefore approved for publication.
