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機(jī)械合金化對WZrZn合金沖擊反應(yīng)特性的影響
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國防科技大學(xué) 空天科學(xué)學(xué)院

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國家自然科學(xué)基金項(xiàng)目(面上項(xiàng)目,重點(diǎn)項(xiàng)目,重大項(xiàng)目)


Effect of mechanical alloying on impact initiated reaction characteristics of WZrZn alloy
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    摘要:

    W具有高的熱慣性以及低的絕熱火焰溫度,導(dǎo)致其在空氣中難以燃燒。為改變W的燃燒特性,本文通過機(jī)械合金化將20 wt.%的Zr引入W中。XRD、SEM及STEM分析表明,球磨30 h后,Zr的衍射峰完全消失,得到了單相BCC結(jié)構(gòu)的W(Zr20)超飽和固溶體合金粉末。在此基礎(chǔ)上,以Zn粉作為粘結(jié)劑,采用熱壓工藝制備WZrZn合金。準(zhǔn)靜態(tài)力學(xué)性能測試和彈道槍實(shí)驗(yàn)結(jié)果表明,以W(Zr20)合金粉末為原料制備的W(Zr20)-Zn30合金的抗壓強(qiáng)度和能量釋放特性明顯優(yōu)于機(jī)械混料制備的W/Zr20-Zn30合金。在1200 m/s的沖擊速度下,W(Zr20)-Zn30合金的反應(yīng)超壓達(dá)到0.21 MPa,能量釋放特性優(yōu)異。同時(shí),在反應(yīng)產(chǎn)物分析中,發(fā)現(xiàn)大量鎢的燃燒產(chǎn)物WO3,表明Zr的固溶誘發(fā)了W的燃燒反應(yīng),有效提高了WZrZn合金的沖擊反應(yīng)特性。

    Abstract:

    W has high thermal inertia and low adiabatic flame temperature, which makes it difficult to burn in air. To change the combustion characteristics of W, 20 wt.% Zr was introduced into W by mechanical alloying. XRD, SEM and STEM analysis showed that after ball milling for 30 h, the diffraction peak of Zr disappeared completely, and the W(Zr20) super-saturated solid solution powders with single BCC phase were obtained. Subsequently, WZrZn alloys were prepared by hot pressing with Zn powder as binder. The results of quasi-static mechanical properties tests and ballistic gun experiments showed that the compressive strength and energy release characteristics of W(Zr20)-Zn30 alloy prepared by W(Zr20) alloy powder were significantly better than those of W/Zr20-Zn30 alloy prepared by conventional mechanical mixing. Under the impact velocity of 1200?m/s, the reaction overpressure of W(Zr20)-Zn30 alloy reached?0.21 MPa.?In the analysis of reaction products, a large amount of WO3 were found, indicating that the solid solution of Zr induced the combustion reaction of W, which effectively improved the impact initiated reaction characteristics of the WZrZn alloy.

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趙孔勛,劉澤人,張周然,唐宇,李順,朱利安,葉益聰,白書欣.機(jī)械合金化對WZrZn合金沖擊反應(yīng)特性的影響[J].稀有金屬材料與工程,2023,52(3):999~1006.[Zhao Kongxun, Liu Zeren, Zhangzhouran, Tang Yu, Li Shun, Zhu Li an, Ye Yicong, Bai Shuxin. Effect of mechanical alloying on impact initiated reaction characteristics of WZrZn alloy[J]. Rare Metal Materials and Engineering,2023,52(3):999~1006.]
DOI:10.12442/j. issn.1002-185X.20220556

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  • 收稿日期:2022-06-29
  • 最后修改日期:2022-07-20
  • 錄用日期:2022-08-12
  • 在線發(fā)布日期: 2023-04-07
  • 出版日期: 2023-03-24