力學性能的影響
(1. 蘭州理工大學 甘肅有色金屬新材料省部共建國家重點實驗室，蘭州 730050；
2. 北京工業(yè)大學 國家教育部功能材料重點實驗室，北京 100022)
摘 要: 采用銅模吸鑄法將Ti元素添加到Zr65Cu17.5Al7.5Ni10非晶合金中，制備得到直徑為3 mm的大塊非晶合金。采用X 射線衍射(XRD)、掃描電子顯微鏡(SEM)、示差掃描量熱儀(DSC)和微機控制電子式萬能試驗機等研究半固態(tài)處理對Zr60Cu17.5Al7.5Ni10Ti5大塊非晶合金的微觀組織結構、非晶形成能力、壓縮力學性能以及斷口形貌的影響。結果表明：半固態(tài)處理技術對非晶合金材料的組織結構和力學性能有很大的影響，能夠提高非晶合金的強度和塑性；半固態(tài)下Zr60Cu17.5Al7.5Ni10Ti5表現出較好的非晶形成能力，表征非晶形成能力的參數Trg為0.618 9，過冷液相區(qū)∆Tx達到40 K；且當吸鑄電壓為7 kV時試樣的塑性最好，為1.94%，強度為1 487.411 MPa。
關鍵字: 非晶合金；半固態(tài)處理；非晶形成能力；吸鑄電壓；力學性能
mechanical properties of Zr60Cu17.5Al7.5Ni10Ti5 bulk amorphous alloys
（1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology,
Lanzhou 730050, China;
2. The Key Laboratory of Advanced Functional Materials, Ministry of Education,
Beijing University of Technology, Beijing 100022, China）
Abstract:A bulk amorphous alloy with diameter of 3 mm was prepared by water-cooled copper mold method through adding Ti element into the matrix of Zr60Cu17.5Al7.5Ni10Ti5. X-ray diffractometer (XRD), scanning electron microscope (SEM), differential scanning calorimeter (DSC) and micro-electric universal testing machine were employed to investigate the effect of semi-solid technology on the microstructure, glass forming ability, compression mechanical properties and facture surface of Zr60Cu17.5Al7.5Ni10Ti5 bulk amorphous alloy. The results indicate that the semi-solid technology markedly affects the structure and mechanical properties of the amorphous material, and improves the intensity and plastic of the alloy. The semi-solid Zr60Cu17.5Al7.5Ni10Ti5 exhibits an excellent glass forming ability, with Trg of 0.618 9 and supercooled liquid region (∆Tx) of 40 K. When the suction-casting voltage is 7 kV, the sample with the best plastic of 1.94%, strength of 1 487.411 MPa is obtained.
Key words: bulk metallic glass; semi-solid processing; glass forming ability; suction-casting voltage; mechanical properties
