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In this paper, we report the design, fabrication, and performance evaluation of MEMS wireless temperature sensor, which can be applied to the wall temperature measurement in combustors. The sensor is composed of a LCR resonant circuit and its coil is inductively coupled with an external read-out coil for the wireless sensing. Electrical resistance change of the coil due to the temperature change is used to measure the wall temperature. A prototype sensor is fabricated with MEMS technologies and its performance is evaluated in the temperature range of 25 - 200 °C. The measured sensitivity is found to be 2.5 °C at 177 °C, when the distance between the sensor and the readout coil is 1.77 mm.

Extensive work was conducted to develop a corrosion resistant brazing sheet alloy and to apply it to a drawn cup type evaporator in automotive air conditioning system. The items to be investigated included the influence of chemical composition of the core alloy on corrosion resistance, suppression of erosion during the brazing cycle, and enhancement of the brazing sheet formability. Additional investigation was conducted to develop a new corrosion test method on the basis of better understanding of the mechanism of corrosion in the field and to evaluate the corrosion resistance of a evaporator fabricated from the new alloy. This paper, as Part 1, describes the results of alloy development from the metallurgical and electrochemical point of view.