CAJ | 학술논문

本文研究了高能等离子喷涂和大气等离子喷涂两种工艺中粉末束流的特点，并采用两种喷涂工艺制备YSZ涂层，通过观察涂层在热循环条件下的微观组织变化，探讨了高能等离子喷涂YSZ涂层的热循环失效机理。结果表明，采用高能等离子喷涂工艺时，粉末粒子的速度可达430m/s，而采用常规大气等离子喷涂时，其速度仅为275m/s；采用高能等离子喷涂工艺制备的YSZ涂层的结合强度可大于60MPa，而大气等离子喷涂的YSZ涂层的结合强度为45MPa；与大气等离子喷涂相比，高能等离子喷涂工艺制备的YSZ涂层的热循环寿命可提高20%；在热循环过程中涂层内可形成垂直裂纹，但两种涂层的热循环失效方式相似。
본문연구료고능등리자분도화대기등리자분도량충공예중분말속류적특점，병채용량충분도공예제비YSZ도층，통과관찰도층재열순배조건하적미관조직변화，탐토료고능등리자분도YSZ도층적열순배실효궤리。결과표명，채용고능등리자분도공예시，분말입자적속도가체430m/s，이채용상규대기등리자분도시，기속도부위275m/s；채용고능등리자분도공예제비적YSZ도층적결합강도가대우60MPa，이대기등리자분도적YSZ도층적결합강도위45MPa；여대기등리자분도상비，고능등리자분도공예제비적YSZ도층적열순배수명가제고20%；재열순배과정중도층내가형성수직렬문，단량충도층적열순배실효방식상사。
The powder beams of atmospheric plasma spraying and high energy plasma spraying had been studied, and Yttrium partially stabilized zirconia coatings (YSZ) were prepared by two kinds of processes. The microstructure of coatings during thermal cycling was studied to reveal the failure mechanism of TBCs. The results showed that:the velocity of the powder by high energy plasma spraying can reach up to 430m/s, while the APS is only 275m/s;bonding strength of coatings prepared by high energy plasma spraying is more than 60MPa and the APS is 45MPa;compared with APS, thermal cycling life of coatings prepared by high energy plasma spraying has been promoted up to 20%at least;the failure mechanisms of the two kinds of coatings are similar except that there is no fracture phenomenon happened in the coatings prepared by high energy plasma spraying.