Vol.11 No.2 2018

報告:Additive manufacturing of ceramic components (大司)−92−Synthesiology Vol.11 No.2(2018)AuthorTatsuki OHJIJoined AIST in 1983, and currently is Fellow thereof since 2017. BS and MS in mechanical engineering from Nagoya Institute of Technology and Ph. D. in inorganic materials engineering from Tokyo Institute of Technology. Has authored more than 350 peer-reviewed papers and 20 book chapters, and has edited more than 40 books and conference volumes. Research interests include mechanical/physical properties, microstructural control, and novel processing of ceramics and related materials. Fellow of American Association for the Advancement of Science (AAAS), American Ceramic Society and ASM International, and Academician of World Academy of Ceramics. Currently serves as Governor of Acta Materialia Inc., Vice President of the Ceramic Society of Japan, and Editor in Chief of Ceramic International and Journal of the American Ceramic Society.Discussions with Reviewers1 OverallComment (Toshimi Shimizu, AIST)This “report” describes research centered on additive manufacturing (AM), of which the author serves as the leader, of the R&D project on high-value added ceramic products manufacturing technologies (HCMT) of the Cross-ministerial Strategic Innovation Promotion Program (SIP). It is a focused presentation of the technological platform of powder-layer manufacturing (PLM), an AM technology for making ceramic products that have uneven thickness or complex shapes that are dicult to process, and of prototypes made from the technology. It is a very eective presentation in understanding the processes that form PLM and the interconnection of the related technological elements. As a report that presents an example of development of technology that has practical value that is expected to lead to innovation, it is suitable for Synthesiology.Comment (Akira Kageyama, AIST)Of ceramic technology and industry in which Japan has excelled, this report summarizes the process by which the HCMT project was started as a national strategical project, and how it succeeded, against the decline of Japan’s world market share along with the improvement of technological level of developing countries. It presents the selection of elemental technologies and integration of each technology, focusing on AM as technology that forms ceramic products of complex shapes that were dicult to make with the conventional technology. It is also worth reading as a report on management of R&D in which collaboration and role assignment was necessary among the participating universities, AIST, and companies. Of the necessary technologies covering a wide range, PLM is selected, and it describes in detail, within the allowed range of disclosure, each of the elemental technologies such as the optimization of raw material powder, which is bound by condentiality. R&D discussion is presented in an easy to understand manner, and it is well worth being printed in this journal.2 Content, structure, research scenario (draft report)Comment (Toshimi Shimizu)The rst draft that was submitted as a research paper and the second draft that was submitted as a report did not satisfy the qualities that are required of Synthesiology. For a writing to be accepted, it needs to cover seven topics: 1. research objective, 2. research target and relationship to society, 3. scenario, 4. selection of elements, 5. relationship among elements and their integration, 6. evaluation of results and future perspectives, 7. originality. The first and second draft did not cover these. Specifically, 1) for 3. scenario, the scenario of hypothesis was not rationally described; 2) for 5. relationship among elements and their integration, the relationship among elements and integration were not rationally described using scientific words; 3) for 7. originality, much information that was already publicly known was presented and it lacked originality. Therefore, its content as it was unfortunately did not apply to a research paper or a report of Synthesiology, which need to focus on the research scenario and specic research processes. The draft covered the whole R&D of AM, and lacked depth in its description of the scenario and hypothesis, and the relationship and integration among elements.The reviewer suggests focusing on PLM technology actively being promoted at AIST as a revision of the content of the report. How about using a diagram which would help the reader to understand and describing in detail each elemental technology related to PLM, how they are corelated, and the process by which they are integrated and optimized?Answer (Tatsuki Ohji)According to your advice, I revised the text, and in Chapter 4 “Platform technologies in PLM,” I have categorized and described in detail each elemental technology of the three processes of powder preparation, lamination, and post process, have presented the relation to other elemental technologies using a diagram (Fig. 5). Especially with strongly related elemental technologies, they were emphasized in the diagram, and the process by which they were integrated and optimized was described. Evaluation items for each process are also considered. Furthermore, in Chapter 5 “Prototype models produced by AM,” the subject was narrowed down to a ceramic stage model and a ceramic lter model attained by PLM, and other prototype models were simply described along with references.Comment (Akira Kageyama)The first draft was submitted as a research paper, and after a review, additions were made, and the manuscript was resubmitted as a report. In the second draft, the signicance of the technologies and their positions are easier to understand as more detailed descriptions were added of the R&D that was bound by confidentiality. However, as a report, it needs to strongly state how technology is introduced to society and how it is to be useful, but this point is not expressed clearly. I suggest a revision on this line. If you rearrange and reorganize the structure, the way of expression, and gures and tables, the point of the report will become clear. For example, a report according to the editorial policy needs to present 1) the aim, 2) the process of development (the course to the goal), and 3) the outcome. Keeping this in mind, the report can be arranged to include 1) the global state of ceramic industry and the situation that Japan faces (situation analysis), 2) the issues that need to be solved in order to overcome the situation, and why the issues were chosen (problem analysis), 3) what was decided technically and in management in order to clear or solve the issues (decision analysis), and 4) the results of R&D and management executed in this project with the above-mentioned 1) to 3) in mind (output and/or outcome). The manuscript already includes these aspects, so why not revise the whole structure and try to make it simpler and clearer?The manuscript is also rather long. In the second draft, as, taking PLM as an example, the relationship and integration of elemental technologies are described, couldn’t the section

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