Yaqub Talha Bin, Al-Rjoub Abbas, Khalid Hafiza Ayesha, Yaqoob Khurram, Fernandes Filipe, Cavaleiro Albano
CEMMPRE-Centre for Mechanical Engineering Materials and Processes, University of Coimbra, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal.
Laboratory of Tests, Wear and Materials, IPN-LED & MAT-Instituto Pedro Nunes, Rua Pedro Nunes, 3030-199 Coimbra, Portugal.
Materials (Basel). 2022 Jun 9;15(12):4088. doi: 10.3390/ma15124088.
Alloyed-transition metal dichalcogenide (TMD) coatings have been under investigation as multi-environment lubricants for the past few decades. These coatings display very low coefficient of friction properties at elevated temperatures. Studies on the annealing of these low-friction coatings are missing in the literature. For the first time, in this study, the annealing of the W-S-N dry lubricant coatings was carried out to study its effects on the composition, morphology, crystal structure and hardness of the coatings. The W-S-N coatings were deposited by direct current (DC) reactive magnetron sputtering. The analysis was carried out for as-deposited, 200 °C and 400 °C annealed coatings. The as-deposited coatings have N content in the range of 0-25.5 at. %. The coatings are compact and the densification increased with the increase in N-alloying. All the coatings are crystalline except the highest N-alloyed coating which is X-ray amorphous. A maximum hardness of 8.0 GPa was measured for the coating alloyed with 23 at. % N. Annealing did not affect the composition and morphology of the coatings, while some variations were observed in their crystal structure and hardness. The maximum hardness increased from 8 GPa to 9.2 GPa after 400 °C annealing of the 23 at. % N-alloyed coating.
在过去几十年里，合金过渡金属二硫属化物（TMD）涂层一直作为多环境润滑剂受到研究。这些涂层在高温下显示出极低的摩擦系数特性。文献中缺少对这些低摩擦涂层退火处理的研究。在本研究中，首次对W-S-N干润滑涂层进行退火处理，以研究其对涂层的成分、形态、晶体结构和硬度的影响。W-S-N涂层通过直流（DC）反应磁控溅射沉积。对沉积态、200℃和400℃退火后的涂层进行了分析。沉积态涂层的N含量在0-25.5原子百分比范围内。涂层致密，且随着N合金化程度的增加致密化程度提高。除了最高N合金化的涂层为X射线非晶态外，所有涂层都是晶体。对于含23原子百分比N的合金涂层，测得的最大硬度为8.0吉帕。退火不影响涂层的成分和形态，但在其晶体结构和硬度方面观察到一些变化。含23原子百分比N的合金涂层在400℃退火后，最大硬度从8吉帕增加到9.2吉帕。
