Development of non-asbestos brake pad composites reinforced with mount merapi volcanic sand and corn stalk fibersSutikno Madnasri, Wara Dyah Pita Rengga, Qotrun Tri Annisa and Delvani Putri Faradilla HamidiE3S Web Conf., 674 (2025) 12001DOI: https://doi.org/10.1051/e3sconf/202567412001