Investigation on Blood Compatibility of Cu/Ti Metal Coating Prepared via Various Bias Voltages and Copper Content

Round 1

Reviewer 1 Report

The present work by Hu et al. investigates the fabrication and and blood compatibility of Cu/Ti metal coatings. The authors prepared metal coatings by magnetron sputtering and characterized by means of XRD, XPS, SEM, CA measurements. Whereas the topic is important, however, the work has a lot of points, which should be addressed in the revised version.

Line 17. The authors claim that their coatings are smooth, however, they did not measure the roughness.

What does it mean “copper sheets”?

Thetitle of 2.2. section is unclear.

The results for sample #2 are duplicated in Figs 2, 3, 4, 5. Why?

Experimental section is unclear. How deposition was performed? From 2 targets simultaneously?

Table 1. What is “copper number”?

Table 2 contains only the results for 2 samples. The results for all prepared samples must be provided for comparison. It is seen, that percentage of oxygen is really high, do the authors consider that titanium or copper oxides formed are amorphous?

Do the authors consider, that the value of contact angle depends on the surface roughness? AFM measurement should be performed in parallel.

The text in Figure 2 is hardly visible.

Figure captions are not relevant for Figures 5 and 6.

There are a lot of typos (e.g. lines 21, 76, 87, 89, 115, 126, 127 and many others).

Author Response

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Reviewer 2 Report

In this manuscript, the authors have tried to demonstrate the effect of Al on microstructure and mechanical response of three different alloys. Indeed, it is true that the Mg alloys have great advantage for several industrial applications. Along this line, I would like to ask the authors to add the references on the recent development of the light weigh Mg-Li alloys at the introduction at this manuscript. -Journal of Alloys and Compounds 711, 243-249 (2017) et al. Furthermore, there is a clear tendency to understand the microstructural evolution of the refinement of the grain size and particle size of Mg17Al12 on the matrix and preferred orientation of the grains thus resulting in improvement of the tensile properties. This is quite nice to suggest the relationship between the microstructrue and mechanical properties. In this point, if possible, please add the clear change of the fractographic analysis with varying the microstructural evolution with increasing Al content. After minor revision, I would like to recommend to publish it in this journal.

Author Response

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Round 2

Reviewer 1 Report

accept

Author Response

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