Vol.5 No.1 2012
Research paper : An analysis method for oxygen impurity in magnesium and its alloys (A. Tsuge et al.)−34−Synthesiology - English edition Vol.5 No.1 (2012) may also cause oxide increase in components. The analysis method for measuring the oxygen content of the materials during the plant processes is highly in-demand as a process management and quality control technology. The Support Industry Project has a purpose to support the product development by companies and our analysis method is expected to disseminate into industry and to become popular. Currently, we are engaging in R&D that aims to sophisticate the method as a quality control technology. AcknowledgementPart of this research was conducted under the project of “Standardization of the Oxygen Analysis Method for Magnesium Metal and Alloy,” sponsored by METI and NEDO. We express our thanks to the members of the execution committee of the project and the Japan Magnesium Association that cooperated in carrying out the project.NotesNote 1) The temperature of the graphite crucible during the application of 2,400 W is estimated to be about 2,000 °C from the comparison with Fig. 13(a).Note 2) Under the assumption that an analysis method as a standard for comparison is greatly different in principle from the analysis method to be standardized, the validity of analysis value by the latter can be assessed by a comparison between them. This is based on the fact that even if both methods have errors from the true value respectively, there is little possibility that the effects of their errors have the same trend. Consequently it can be considered that the effects of the errors are small and that the analysis value is close to the true value when both methods provide similar results. (Corresponding JIS Standard is “JIS Q 0034: 2001 General requirements for the competence of reference material producer”)Note 3) ISO standardization proposal is discussed in the technical committee (TC) for the corresponding technology or the subordinate subcommittees (SC). ISO/TC79/SC5 means the subcommittee no.5 of technical committee no.79, and its name is “Magnesium and alloys of cast or wrought magnesium.” The name of TC79 is “Light metals and its alloys.”Note 4) The countries that participate in the TC and SC of ISO are divided into the P (participating) members that are responsible for actively participating in the committee such as voting for the standard proposal and the O (observer) members. There are nine P members of ISO/TC79/SC5: Japan, China, Korea, Germany, UK, Italy, Russia, Spain, and Romania. China is the secretariat.ReferencesChubu Economic Federation: Ondanka Mondai To Kotsu-Taikei No Arikata (2007) (in Japanese).The Japan Magnesium Association: Heisei 16 Nendo Jidoshayo Mg No Jitsuyoka Ni Kansuru Chosa (2005) (in Japanese).A. G. Haerle: The effect of non-metallic inclusions on the properties of die cast magnesium, SAE Technical Paper 970331, Detroit, MI, (1997).H. Hu and A. Luo: Inclusion in molten magnesium and potential assessment technique, JOM, 10, 47-51 (1996).N. Nishi: Progress of die-casting - from printing type to suspension parts of automobile, Keikinzoku, 57, 163-170 (2007) (in Japanese).R. Inoue and H. Suito: Determination of oxygen in iron-aluminum alloy by inert gas fusion-infrared absorptiometry, Material Transactions, JIM, 32 (12), 1164-1169 (1991).M. Sakamoto and H. Ueno: Energy savings in transportation systems by weight reduction of their components - Research and development of non-combustible magnesium alloys, Synthesiology, 2 (2), 127-136 (2009) (in Japanese) [Synthesiology English edition, 2 (2), 121-131].AuthorsAkira TsugeJoined the National Industrial Research Institute of Nagoya, Agency of Industrial Science and Technology in 1983, and engaged in the R&D for chemical analysis method of fine ceramics. After reorganization to AIST, also engaged in the research for industrial standard. In the drafting and revision of JIS R1603, R1616, was in charge of the development of the analysis method for oxygen, nitrogen, and carbon impurities in the powder of fine ceramics material. Currently, senior researcher of the Inhomogeneity Analysis Research Group, Research Institute of Instrumentation Frontier. In this research, worked on the development of the analysis method and ISO draft preparation in the research under the Standard Certification R&D Project, METI, and also worked in the preliminary activities for the standard proposal through participation in the ISO/TC79/SC5 meetings.Wataru KanematsuJoined the National Industrial Research Institute of Nagoya, Agency of Industrial Science and Technology in 1984, and engaged in research on the mechanical properties and machining damage of structural ceramics. After reorganization to AIST, also engaged in the research for industrial standard. Worked as the chief of committee for drafting JIS R1674, convener of ISO/TC206 (fine ceramics) /WG31, and project leader of ISO/TC206/WG36. Currently, leader of the Inhomogeneity Analysis Research Group, Research Institute of Instrumentation Frontier. In this research, worked on the coordination of the research under the Standard Certification R&D Project, METI as well as the ISO proposal drafting.