喷射式冲蚀磨损实验系统及红外光学材料冲蚀行为研究

Study on Gas-blasting Erosion Tester and Erosion Behavior of Infrared Optical Materials

自行设计和制造了喷射式冲蚀磨损实验系统及双速双盘测速装置,通过对磨料供给系统的改进,提高了磨料供给稳定性和控制精度,采用双速双盘测速装置使喷砂速度的测量精度达到±5%。对红外光学材料Ge、ZnS、MgF2和石英玻璃进行了冲蚀实验,测量了冲蚀磨损对红外透过率的影响,并通过对冲蚀表面的扫描电子显微观测,对冲蚀机理进行了探讨。结果表明,该喷射式冲蚀磨损实验系统能够满足冲蚀实验要求;在相同冲蚀条件下,不同的红外光学材料具有不同的冲蚀率,造成红外透过率不同程度的降低,具有不完全相同的冲蚀机理。

A new gas-blasting erosion tester was designed and produced by ourselves. Solid particles feeding device was improved and the flux was more stable and the setting of the abrasive flow rate was more accurately. Based on Double Disk method, a new measurement named Double Speed Double Disk method was used to calibrate the partic!es velocity, and the accuracy was about 4：_5%. Ge, ZnS, MgF2 and Quartz were used as erosion target. The erosion rate and the effect of erosion on the infrared transmittance were studied. The damaged surface morphology was characterized by scanning electron microscopyand the erosion mechanism was explored. The results indicate that the new erosion tester can meet the requisition of erosion test. Under the same experimental condition, the erosion rate, the loss of infrared transmittance and the erosion mechanism are different according to different materials.