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It is known that titanates widely use materials for the Non-Asbestos-and-Organic formulation; NAO has excellent performance such as stability in friction level and low wear for disc brake pads. In our previous report[1], we presented that those brake performance depends on the chemical composition, crystal structure and powder properties of titanates from the dynamometer test results. And we introduced the thrust test machine to evaluate friction materials easily[2]. In this study, we have improved the thrust test condition to the repetition of sliding and stopping instead of the continuous sliding. In this interval method, we have controlled the temperature of the friction surface, and have been able to observe a phenomenon of wear that occurs under high temperature in our laboratory. Then we clarified the correlation between powder characteristics and brake performances.

Titanate compounds are well-known for being widely used in Non-Asbestos Organic (NAO) brake pad formulations. These NAO formulations provide excellent performance in friction stability and a low amount of wear for disc brake pads. In our previous reports, we observed that brake performance in dynamo testing is influenced by a titanate's chemical composition, crystalline structure, and powder properties. We also introduced the thrust test machine as an easy method to evaluate friction materials [1], [2]. In our later research, Otsuka synthesized a new non-fibrous titanate that performs nearly at the same level as fibrous titanates. This new non-fibrous compound contains many pores which form as a result of aggregates of submicron-sized particles; this thereby provides strong fade-proof performance [3].

There are various requirements, such as NVH performance, wear resistance, stability in friction level, rotor compatibility, etc. for friction materials of brake pads. In these materials, potassium titanate fiber is widely used due to its specific benefits that contribute to stability in friction level and low wear. Focusing on titanate compounds including potassium titanate fiber, we have proceeded with an analysis of the relationship between their powder properties and brake performance. Before the evaluation, various types of titanate compounds were prepared for comparison, according to their chemical composition, size and crystal structure. We measured the powder properties by a powder tester. The brake performance tests have been conducted with NAO formulations in accordance with JASO C-406 P1 category. The test results showed some specific benefits for brake performance in the formulation with TERRACESS added.