Continuous silicon carbide fiber-reinforced silicon carbide ceramic matrix composites (SiC/SiC) are key materials for new-generation aviation and aerospace hot-section components. However

their intermediate and high-temperature oxidation resistance and durability still face significant challenges. This paper systematically reviews recent research progress in enhancing the oxidation resistance of high-temperature SiC/SiC composites through matrix composition regulation

with a focus on four modification strategies based on boron

aluminum

rare earth

and transition metal elements. It provides an in-depth comparative analysis of these four types of technologies. The paper elaborates on the introduction methods and effectiveness of various modifiers and critically reviews their core mechanisms

performance boundaries

process limitations

and inherent challenges. Analysis indicates that boron modification offers the highest self-healing efficiency in the intermediate temperature range (<1200 ℃) but faces limitations due to volatility at high temperatures. Aluminum modification extends the effective protection window to 1200 – 1400 ℃ by stabilizing the glass phase. Rare earth modification holds great potential in the ultra-high temperature regime (>1300 ℃) due to its excellent thermal compatibility

yet encounters challenges related to fiber compatibility and hydrolytic stability. Transition metal modification offers a novel approach for constructing ultra-high-temperature physical barriers. Finally

the paper identifies three key future research directions: Multi-element synergistic design

intelligent low-damage manufacturing

and modeldriven lifetime prediction. The aim is to provide theoretical guidance for achieving the long-term

reliable service of SiC/SiC composites in extreme environments.