CAJ | 학술논문

等离子喷涂陶瓷涂层与基体间的结合强度往往较小，限制了其应用。本文采用4因素3水平正交试验，通过在线监测 BaTiO3喷涂粒子的温度及飞行速度，对喷涂电流，喷涂电压，喷涂距离和主气流量等4个参数进行优化设计，结果表明：喷涂距离对BaTiO3涂层的结合强度影响较大，其次为喷涂电流，主气流量及喷涂电压。喷涂电压和主气流量对喷涂粒子飞行速度的影响较大。利用Spray Watch-2i对不同喷涂距离的粒子特性进行分析，进一步验证了喷涂距离是影响涂层最终性能的关键因素。优化的工艺参数为喷涂距离100 mm、喷涂电流450 A、氩气流量3.2 m3/h、电压140 V；采用该优化工艺，涂层的结合强度为57 MPa，显微硬度为747.13HV0.1，孔隙率为0.3%，纳米压痕仪测得的涂层的表面硬度为12.21 GPa，弹性模量为189.25 GPa，具有较好的力学性能。
등리자분도도자도층여기체간적결합강도왕왕교소，한제료기응용。본문채용4인소3수평정교시험，통과재선감측 BaTiO3분도입자적온도급비행속도，대분도전류，분도전압，분도거리화주기류량등4개삼수진행우화설계，결과표명：분도거리대BaTiO3도층적결합강도영향교대，기차위분도전류，주기류량급분도전압。분도전압화주기류량대분도입자비행속도적영향교대。이용Spray Watch-2i대불동분도거리적입자특성진행분석，진일보험증료분도거리시영향도층최종성능적관건인소。우화적공예삼수위분도거리100 mm、분도전류450 A、아기류량3.2 m3/h、전압140 V；채용해우화공예，도층적결합강도위57 MPa，현미경도위747.13HV0.1，공극솔위0.3%，납미압흔의측득적도층적표면경도위12.21 GPa，탄성모량위189.25 GPa，구유교호적역학성능。
The low bonding strength between the plasma sprayed ceramic coating and the substrate often limits its application. In the present paper, four parameters including spray current, spray voltage, spraying distance, and main gas flow were optimized by online monitoring of the temperature and flight speed of the BaTiO3 spray particles, based on the four factors and three levels orthogonal tests. The results show that the effect of spraying distance on the bonding strength of the BaTiO3 coating is the greatest, followed by spraying current, main gas flow, and spray voltage, respectively. The spray voltage and primary gas flow rate have great impact on the spraying velocity of spray particles. Spray Watch-2i was used to analyze the particle characteristics under different spraying distances, to further validate that spraying distance is a key factor affecting the final properties of the spraying coating. The optimized process parameters are that the spray distance is 100 mm, the spray current is 450 A, the argon flows is 3.2 m3/h, and the voltage is 140 V. By using the optimized process, the bonding strength of the BaTiO3 coating is 57 MPa;the microhardness is 747.13HV0.1;the porosity is 0.3%. The nanoindentor was used to measure the mechanical properties. The surface hardness and elastic modulus of the coating are 12.21 GPa and 189.25 GPa, respectively, showing good mechanical properties.