(Cu46Zr46Al8)100-XYX金屬玻璃的玻璃形成能力與抗腐蝕能力之研究

The Research on the Glass-Forming Ability and Corrosion Resistance of (Cu46Zr46Al8)100-XYX Metallic Glass

鄒濤宇(Tao-Yu Tsou)

指導教授 ： 陳適範 ； 林於隆

國立臺北科技大學/工程學院/材料科學與工程研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00435

摘要

本研究以具有高玻璃形成能力的Cu46Zr46Al8合金成分為基材，添加不同原子百分比的釔元素，在氬氣保護的真空電弧熔煉爐中配製【(Cu46Zr46Al8)100-XYX, (X=0, 2, 4, 8)】母合金，以單輥熔射旋淬法製作厚約30 μm的薄帶，以吸引鑄造法於水冷銅模中，製成長約90 mm、直徑4 mm的圓柱棒材。應用示差掃描熱分析儀（DSC）檢測試樣的玻璃轉化溫度（Tg）、結晶化溫度（Tx）。藉由光學顯微鏡（OM）、X光繞射儀（XRD）、掃描式電子顯微鏡（SEM）及能量散佈光譜儀（EDS）鑑定試片之微觀結構。利用重量損失試驗計算出試樣的腐蝕速率，以判定其抗腐蝕能力。
由XRD繞射結果顯示(Cu46Zr46Al8)100-XYX薄帶為具有一寬廣繞射峰之非晶質結構，VAR棒材為非晶質基地上有細小結晶的結構。熱性質方面，釔添加量4 at. %時，薄帶的ΔTx由99 K提高至101 K，棒材的ΔTx由60 K提高至75 K。抗腐蝕能力方面，(Cu46Zr46Al8)100-XYX金屬玻璃在1 M H2SO4溶液中，腐蝕速率為0.037-0.051 mm/yr，腐蝕表面呈現均勻的鈍化膜；在含氯離子溶液中，腐蝕速率為0.194-0.286 mm/yr，腐蝕表面可以觀察到不均勻的鈍化膜及孔蝕現象。(Cu46Zr46Al8)100-XYX金屬玻璃與304L不鏽鋼比較，發現(Cu46Zr46Al8)100-XYX金屬玻璃在H2SO4溶液及含氯離子溶液中，抗腐蝕能力皆優於304L不鏽鋼。
實驗結果顯示，添加適量的釔元素（4 at. %），可以有效地維持Cu46Zr46Al8金屬玻璃合金的高玻璃形成能力並擁有良好的抗腐蝕能力。

關鍵字

金屬玻璃 ； 玻璃形成能力 ； 抗腐蝕能力

並列摘要

In this study, the preparation of 【(Cu46Zr46Al8)100-XYX, X=0, 2, 4, 8】 metallic glass ribbons and rods were synthesized by the single roller melt-spinning method and the suction casting method. To examine the glass transition temperature(Tg) and the crystallization temperature(Tx), the sample was measured with a differential scanning calorimetry(DSC). Microstructure were examined by X-ray diffraction(XRD), scanning electron microscopy(SEM) and Energy dispersive spectrometers(EDS). Corrosion resistance was examined by weight loss to calculate the corrosion rate.
By the X-ray diffraction pattern, ribbons are all amorphous, rods are amorphous matrix and small crystalline phase. By the thermodynamic property, ribbons’ ΔTx from 99 K to 101 K, rods’ ΔTx from 60 K to 75 K. By the corrosion resistance property, (Cu46Zr46Al8)100-XYX metallic glasses rods’ corrosion rate from 0.037-0.051 mm/yr in 1 M H2SO4, and the uniform oxide films are on the surface. Corrosion rate from 0.194-0.286 mm/yr in solution with chloride iron, and the inequality oxide films and pitting are on the surface. In H2SO4 and solution with chloride iron, (Cu46Zr46Al8)100-XYX metallic glass show better corrosion resistance than 304L stainless steel.
As the results, the advisable addition of yttrium(4 at. %) was very effective in remaining high glass forming ability of Cu46Zr46Al8 metallic glass alloy and having superior corrosion resistance property.

並列關鍵字

Metallic glass ； Glass forming ability ； Corrosion resistance

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