Fig. 13 shows the absolute value of the maximum temperature for all processes. To ensure clarity, data for only two thermocouples is presented, i.e. thermocouple 5, where the SHS reaction always started, and thermocouple 3, which always achieved the highest temperature during the reaction. Analysis of the maximum temperature achieved during the SHS reaction shows that the central portion of the sample (thermocouple 3) generates higher reaction temperature than the edge (thermocouple 5). The maximum temperature of thermocouple 3 in virtually all processes is greater than that of thermocouple 5 by 10 to 30 C. A strong influence of chemical composition on the maximum temperature achieved during the reaction is visible. With increasing aluminum content in the sample, the maximum temperature of the reaction increases as well. This effect is in accordance with the literature. As described Joslin et al. [22] and Jozwiak et al.[23], with increases of aluminum content the enthalpy of the reaction, and hence the maximum reaction temperature is higher.