淳道勇,汪瑞军,由晓明,何箐,邹晗,吕玉芬.纳米8YSZ粉末不同温度下烧结行为研究[J].表面技术,2016,45(9):118-125.
CHUN Dao-yong,WANG Rui-jun,YOU Xiao-ming,HE Qing,ZOU Han,LYU Yu-fen.Sintering Behaviour of Nanocrystalline 8％Yttria Stabilized Zirconia Powders at Various Temperatures[J].Surface Technology,2016,45(9):118-125 |
| 纳米8YSZ粉末不同温度下烧结行为研究 |
| Sintering Behaviour of Nanocrystalline 8％Yttria Stabilized Zirconia Powders at Various Temperatures |
| 投稿时间：2016-03-17 修订日期：2016-09-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2016.09.019 |
| 中文关键词: 纳米8YSZ粉末 高温热处理 晶粒尺寸 相转变 晶粒生长 生长活化能 |
| 英文关键词:nanocrystalline 8% yttria stabilized zirconia powders high temperature heat treatment particle size phase transition grain growth activation energy |
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| Author | Institution |
| CHUN Dao-yong | Aircraft Engine Room of the Navy office in Guizhou, Guizhou 561102, China |
| WANG Rui-jun | Surface Engineering Research Institute, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China |
| YOU Xiao-ming | Surface Engineering Research Institute, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China |
| HE Qing | Surface Engineering Research Institute, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China |
| ZOU Han | Surface Engineering Research Institute, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China |
| LYU Yu-fen | Surface Engineering Research Institute, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China |
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| 中文摘要: |
| 目的 通过关注纳米8YSZ粉末在不同温度下烧结过程中的晶粒长大行为及相结构组成变化，获得纳米8YSZ粉末的高温稳定性，防止高温烧结导致纳米8YSZ涂层性能明显衰减，致使涂层在正常服役过程中过早失效。方法 采用共沉淀工艺合成低杂质含量的8YSZ纳米粉末，经过低温煅烧预处理后，在900~1200 ℃温度区间进行3~12 h的烧结。通过X射线衍射仪和扫描电子显微镜对纳米颗粒进行物相结构和形貌分析，根据Scherrer公式计算热处理后的颗粒平均晶粒尺寸，采用Arrhenius公式得到晶粒生长活化能，进而确定晶粒的生长机制。结果 经过低温煅烧预处理后，粉末绝大多数仍然保持非晶态结构，经过高温热处理后，粉末均完成了晶态转化，相结构基本为单一四方相。温度为900~1100 ℃时，晶粒生长的活化能为42.638 kJ/mol；温度为1100~1200 ℃时，晶粒生长的活化能为3.849 kJ/mol。结论 高温热处理后，纳米8YSZ粉末物相结构为单一四方相，可以保持高温稳定性，防止涂层性能明显衰减。温度为900~1200 ℃时，晶粒生长机制以表面扩散为主的聚合生长。 |
| 英文摘要: |
| Objective To obtain the temperature stability of nanocrystalline 8% yttria stabilized zirconia (8YSZ) and prevent the apparent decline of properties of the 8YSZ coating owing to the sintering behavior by investigating the changes of the grain size and the phase composition of the nanocrystalline 8YSZ powders. Methods The nanocrystalline 8YSZ powders with low impurity were prepared by co-precipitation method. Then they were sintered for 3~12 h at 900~1200 ℃ after low temperature calcination. Phase composition and morphology were analyzed by XRD and SEM. The average particle size after heat treatment was calculated by Scherrer formula. Grain growth activation energy was obtained by Arrhenius formula and then the grain growth mechanism was determined. Results Most powders kept amorphous after low temperature calcination pretreatment. After high temperature heat treatment, crystalline state was transformed and the phase of the powders changed to tetragonal. The activation energy was 42.638 kJ/mol at 900~1100 ℃, and 3.849 kJ/mol at 1100~1200 ℃. Conclusion It is primary tetragonal phase after high temperature heat treatment among the nanocrystalline 8YSZ powders which could retain the temperature stability and prevent apparent decline of coating property while the grain growth is controlled by surface diffusion at 900~1200 ℃. |
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