2017 Volume 58 Issue 11 Pages 1616-1623
The effects of process parameters such as air flow rate, heating rate, sample surface area per volume (specific surface area), and sample compositions on the ignition temperature of magnesium alloys, both with and without calcium, were investigated by using differential thermal analysis. For magnesium alloys without calcium, increases in the heating rate, air flow rate, and specific surface area all contributed to a decrease in the ignition temperature, while an increase in the aluminum concentration promoted an increase in the ignition temperature at least under the present experimental conditions used in the present study. For magnesium alloys with calcium, adding 2 mass% calcium contributed to a significant increase in the ignition temperature. The effects of the flow rate, specific surface area and aluminum concentration on the ignition temperature qualitatively led to the same tendencies in magnesium alloys both with and without calcium. For the air flow rate, however, the opposite trend was observed. In the present study, the ignition temperatures obtained were much higher than those described in the literature, most likely because of the large differences in the specific surface area.
This Paper was Originally Published in Japanese in J. JILM 66 (2016) 273–279.
