First-Principle Study of the Interface of Al2O3/CoCr Metal-Based Composites
Round 1
Reviewer 1 Report
The presented publication seems particularly strong in terms of the development and production of CoCr alloys, which are indispensable for dental implants, with SLM, an innovative mass production method. However, I believe that some deficiencies should be corrected before the publication.
-Where did the CoCr powders procured from and what size and purity? Same for Al2O3 powders.
-'milling' should be used for 'grinding' in the whole the text.
-In the head of 2.3.2, I think Figures 2-4 should be changed to Figures 3-4.
-ball milling parameters (rotation speed, milling process time, ball powder ratio, ball and chamber materials, etc.) are not specified.
-I could not understand how the sphericity of the powders applied with ball milling did not disappear and Al2O3 particles were deposited on it by milling.
-Hasn't a research been done on the hardness of composite materials?
-English used in the study should be improved.
Author Response
Dear Editor and Reviewers:
On behalf of my co-authors, we are very grateful to you for giving us an opportunity to revise our manuscript. we appreciate you very much for your positive and constructive comments and suggestions on our manuscript entitled " First-Principle Study of the Interface of Al2O3/CoCr Metal-based Composites" (ID: coatings-2282577).
We have studied reviewers' comments carefully and tried our best to revise our manuscript according to the comments. The following are the responses and revisions I have made in response to the reviewer' questions and suggestions on an item-by-item basis. Thanks again to the hard work of the editor and reviewer!
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The manuscript proposes the calculation of the interface bonding properties of Al2O3/CoCr metal matrix composites using the first principles. Components with different percentages of the elements were produced by selective laser melting (SLM). The phases in the Al2O3/CoCr metal matrix composites and the microstructure were analyzed.
The work is interesting and well-structured. It should be considered for publication in this journal after a minor review taking into account the following points:
· There are some typos in the text (i.e. gamma-Co instead of γ-Co). Please review the document.
· In the abstract, please revise the sentence “The phases in the Al2O3/CoCr metal matrix composites of selective laser melting (SLM) and microstructure of it, which provides a research method for modifying the properties of traditional CoCr alloys.”.
· Figure 4 is not consistent with section 2.3.2 in which it is inserted.
· Please add the process parameters used for manufacturing the components via SLM.
· In section 2.3.2, the use of the word “forming” is misleading. Please replace it with "manufacturing" or "production".
Comments for author File: 
Comments.docx
Author Response
Dear Editor and Reviewers:
On behalf of my co-authors, we are very grateful to you for giving us an opportunity to revise our manuscript. we appreciate you very much for your positive and constructive comments and suggestions on our manuscript entitled " First-Principle Study of the Interface of Al2O3/CoCr Metal-based Composites" (ID: coatings-2282577).
We have studied reviewers' comments carefully and tried our best to revise our manuscript according to the comments. The following are the responses and revisions I have made in response to the reviewer' questions and suggestions on an item-by-item basis. Thanks again to the hard work of the editor and reviewer!
Author Response File: Author Response.pdf
