0.6336Cu0.1452Ni0.1012Al0.12)100-xTmx(x=0~5,原子分?jǐn)?shù))塊體金屬玻璃(BMG)合金,研究了Tm對(duì)合金力學(xué)性能和抗腐蝕性能的影響。結(jié)果表明,當(dāng)Tm含量增加到3%時(shí),其玻璃形成能力(GFA)和壓縮塑性顯著提高,但過量Tm會(huì)降低GFA。x=3時(shí)合金的最大過冷液相區(qū)寬度為100 K,抗壓強(qiáng)度為1669 MPa,塑性應(yīng)變?yōu)?1.01%,遠(yuǎn)高于Zr0.6336Cu0.1452Ni0.1012Al0.12 BMG的各項(xiàng)性能(67 K、1439 MPa和5.90%)。然而,電化學(xué)測(cè)試結(jié)果表明,x=3時(shí)的合金在3.5%(質(zhì)量分?jǐn)?shù))NaCl溶液中的耐腐蝕性不佳,且其耐腐蝕性和力學(xué)性能隨Tm含量的變化趨勢(shì)與預(yù)期不同??赡苁怯捎谶^量添加稀土元素Tm,容易形成更多的氧化物,導(dǎo)致點(diǎn)蝕加劇。進(jìn)一步添加Tm可以提高Zr基BMG鈍化膜的完整性和耐點(diǎn)蝕性能,但力學(xué)性能不理想。;A series of (Zr0.6336Cu0.1452Ni0.1012Al0.12)100-xTmx (x=0~5, at%) bulk metallic glass (BMG) alloys were fabricated by copper mold suction casting, and the effect of Tm on the mechanical and corrosion properties were investigated. The results show that when Tm content increases to 3at%, the glass forming ability (GFA) and compressive plasticity are significantly improved, whereas GFA is decreased by adding excessive Tm. The maximum supercooled liquid region width (ΔTx) of the alloy with x=3 is 100 K, the compressive fracture strength is 1669 MPa, and the plastic strain is 21.01%, which are much higher than those of the Zr0.6336Cu0.1452Ni0.1012Al0.12 BMG (67 K, 1439 MPa, and 5.90%). However, the electrochemical test results show that the alloy with x=3 does not have excellent corrosion resistance in 3.5wt% NaCl solution, and the change trend of corrosion resistance and mechanical properties with Tm content is different from the expectation. The possible reason is that the excessive addition of rare-earth element Tm easily causes more oxides, which leads to the severe pitting corrosion. Further addition of Tm can improve the integrity and pitting corrosion resistance of Zr-based BMG passivation film, but the mechanical properties are not ideal."/>

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