{'fraction_non_alphanumeric': 0.0314410480349345, 'fraction_numerical': 0.01834061135371179, 'mean_word_length': 4.563106796116505, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Effect of SiC x O y Decomposition on Densification of SiCO(Al) Fibers during Sintering Process

: The transformation from SiCO(Al) fiber to SiC(Al) fiber by high temperature heat-treatment was studied. The characteristics of SiC x O y decomposition and effects of different heating approaches on microstructure and densification processing of SiCO(Al) fibers were investigated. It was found that SiC x O y phase typically decomposed at temperature ranged from 1430 ℃ to 1850 ℃ . The SiC x O y phase in the core area of fiber could not be eliminated completely by continuous heat-treatment, even at the temperature as high as 1800 ℃ . Furthermore, large pore faults and grain coarsening tended to generate in the fibers due to over-high decomposition rate, which led to loose structure of fibers. By contrast, static heat-treatment could increase the degree of SiC x O y decomposition. The SiC x O y phase could be completely removed when the fibers were heat-treated at 1650 ℃ for 1 h, and big pores and heterogenous grains were suppressed. Finally, densified SiC(Al) fibers with large β -SiC grains could be achieved after sintering at 1900 ℃ .