Abstract SiC was sintered by spark plasma sintering (SPS) using polycarbosilane (PCS), and the effects of pressure on the sintering behavior of SiC during SPS were investigated. The pressure conditions were set as 40 and 80 MPa, and pyrolyzed PCS was used to induce reactive sintering during heat treatment such as pyrolysis, crystallization, and crystal growth. According to the results, a high pressure accelerated the reactions in samples and resulted in a high-density body consisting of small-sized grains; however, it induced a phase transition to the α phase, which is stable at high temperatures.

中文翻译：

---

无添加剂放电等离子体烧结致密聚碳硅烷衍生 SiC 的相变

摘要 使用聚碳硅烷（PCS）通过放电等离子烧结（SPS）烧结SiC，研究了SPS过程中压力对SiC烧结行为的影响。压力条件设置为 40 和 80 MPa，并在热解、结晶和晶体生长等热处理过程中使用热解 PCS 诱导反应烧结。结果表明，高压加速了样品中的反应，形成了由小颗粒组成的高密度体；然而，它引发了向α相的相变，该相在高温下是稳定的。