鐵基金屬玻璃以其高硬度、高強度、及耐腐蝕性著稱。而相比於其他種類基材如鈦基、鋯基之金屬玻璃，鐵礦資源更充沛，可有效降低成本並利於商業化。 本研究分利用鐵基金屬玻璃成分Fe-Cr-Mo-C-B-Y-Co，融煉均勻後將其擊碎至40μm以下之粉末製備出結晶粉末。接著以機械合金法將結晶粉末轉化為非晶質結構。再以高速火焰熔射，將兩種粉末噴覆約200 μm的塗層在304不鏽鋼上。探究噴覆鐵基金屬玻璃後之其機械性質與電化學性質。 從光學顯微鏡下顯示，兩種塗層的表面與剖面沒有顯著的裂痕或缺陷，以影像軟體分析，孔隙率為1%以下。XRD測試結果發現，非晶質粉末噴覆的圖層呈現寬廣繞射曲線，具有非晶質的結構。機械性質方面，維克式硬度分析結果，試片硬度從原本的262 ± 24 Hv提升到1150 ± 52 HV，使用碳化鎢球施5N正向力做磨耗測試，塗層磨耗率(1.910-6 mm3/Nm)與其塊狀金屬玻璃相近(2.310-6 Nm/mm3)且較SKD11模具鋼(1.410-5 Nm/mm3)低。 在電化學性質上，噴塗過後的試片在3.5 wt%的氯化鈉，以動態極化法檢測，得出其腐蝕電位為-2.17 V腐蝕電流密度為2.310-08 A/mm2與316不鏽鋼(-0.22 V , 1.210-08 A/mm2)差異並不大，而塗層顯示出高達1.3 V的鈍化區間較316不鏽鋼(0.82 V)高。表面出優異的抗腐蝕性。 整體來說，以高速火焰熔射製備鐵基金屬玻璃塗層，在耐磨耗及抗腐蝕表現優異。 ;Fe-base metallic glass is famous for its high hardness high stress and good corrosion resistance. Compare to other kind metallic glass, Fe-base has higher stress and low coast. This study use Fe-Cr-Mo-C-B-Y-Co series composition bond coats on the 304 stainless steel by High Velocity Oxygen Fuel (HVOF) thermal spray. Investigate its mechanical properties and electrochemistry properties. Optical Microscope shows a homogeneous, crack-free surface and cross section. Hardness from 262 ± 24HV to 1066±53HV, In the wearing test, load 5N normal force at WC ball and get wearing resistance is about 5.3105(Nm/mm3). The wearing performance is better than SKD11(7.4104(Nm/mm3)). In the scratch test, HVOF coating also shows lower friction coefficient than SKD11 . The anodic polarization measurement of HVOF coating, we get the corrosion voltage is 0.2V, corrosion current is 8.510-6 A. For comparison we use 316SS and get corrosion voltage is -0.43V, corrosion current is 2.510-5 A. This test result shows HVOF coating exhibits a higher corrosion resistance, than the 316SS in 3.5 wt% Sodiμm chloride solution. Also we can observe significant pitting in 316SS by Optical Microscope. According to the result, Fe-base metallic glass coating by HVOF thermal spray, can improve the wearing performance and corrosion resistance.
