Mechanical Properties of CaO–Al₂O₃–SiO₂ Glass-Ceramics Precipitating Hexagonal CaAl₂Si₂O₈ Crystals

Round 1

Reviewer 1 Report

This is an interesting and well written paper. I have two suggestions: I would like to see a discussion of strength vs fracture toughness for these materials. It seem relevant and was briefly touched upon by the authors. Second, I would like to know how many 3-point bend samples were tested and how the statistical variations of these were.

Author Response

Dear reviewer,

Thank you for your kind and useful comments.

Discussion on strength vs. fracture toughness was added in the discussion part.

Also, number of samples and thier deviation was added in the results part.

You can find them by red characters in attached revised manuscript .

Best regards,

Kei Maeda

 

 

Author Response File: Author Response.docx

Reviewer 2 Report

Dear Authors,

I have found a similar paper to the manuscript. Please, look at access to document: 10.1016/j.jnoncrysol.2020.119948.

Reviewer

Author Response

Dear reviewer,

Thank you for reviewing our manuscript.

The JNCS paper you pointed out is our previous work in which we investigated the effect of crystallinity on the mechanical behavior of CAS GC.

The main purpose of the paper in Crystals is to review our previous studies on CAS GC and compare them with well-known other GCs, to clarify mechanical properties of CAS GCs especially nonelastic behavior, as well as other properties such as transparency and formability of the precursor glass.  We added the aim of this review paper by red character in our revised manuscript. 

Please find the attched  file.

Best regards,

Kei Maeda

 

 

Author Response File: Author Response.docx

Round 2

Reviewer 1 Report

Thank you for the follow up. Ready for publication.

Reviewer 2 Report

Accept in present form.

This manuscript is a resubmission of an earlier submission. The following is a list of the peer review reports and author responses from that submission.

Round 1

Reviewer 1 Report

In this paper, the authors synthesized a new glass-ceramic (GC) material based on CaCO₃, Al₂O₃, and SiO₂ as well as compared it with enstatite GC and mica GC in terms of mechanical properties.

The submitted manuscript is the revised version of previously submitted crystals-1062312.  But the submitted manuscript is essentially the same as the previous one.

As you wrote at the line74, this manuscript is close to a review of your study.

The preparation method is nearly identical to the authors' previous study (Ref. 22).  The concept of the paper is fine and this paper extends the previous study in terms of mechanical properties and appearances. However, the majority of figures and tables have been published elsewhere, although the authors used proper citations. In other words, only Figures 8, 9, 12, 13 are newly created figures in this paper. Due to the repetition of the authors' previous paper, I find a lack of novelty in this paper and thus do not recommend it for publication as a research article in Crystals.

Reviewer 2 Report

This is a re-submitted manuscript. Although the manuscript is properly written and show results which are supported by well prepared and discussed experimental data, most of the results presented are repetition of previously published work. This aspect of the paper have being raised by other referees in the first version of the manuscript and the authors did very few changes to the original version. To know, the main difference between versions is the inclusion of new X-ray computed tomography data. I recommend the authors to resubmit the paper as a communication, focusing on the new results. Alternatively, the author may write a review, including also more relevant results from the literature. 

Reviewer 3 Report

The considered paper is an exact copy of paper entitled ‘Mechanical properties of CaO–Al₂O₃–SiO₂ glass ceramics precipitating hexagonal CaAl₂Si₂O₈ crystals’ by Kei Maeda, Kosho Akatsuka, and Atsuo Yasumori. In this version of paper the additional author was added and photos of Fig. 8 were replaced with others.  As a result of a lack of novelty in this paper, I do not recommend it for publication in journal of Crystals.

Reviewer 4 Report

This paper mainly presents  mechanical properties of CaO–Al₂O₃–SiO₂ glass ceramics precipitating hexagonal CaAl₂Si₂O₈ crystals. Therefore, the topic of the paper is very interesting and fully describes the issue posed.

Topic presented in this paper gives discussion on the fracture behavior and the transparency of CaO–Al₂O₃–SiO₂ (CAS) glass-ceramic (GC)  compared with these GCs. The authors in this paper show the continuation of their study concerning effect of crystallinity and microstructure on mechanical properties of CaO-Al₂O₃-SiO₂ glass.

This paper is very well written. The text for reader is very clear and easy to read.

The conclusions in the paper are consistent with the evidence and argument presented. These conclusions give us answers for  the main question posed.