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weijiao

木虫 (正式写手)

[交流] 新材料可显著增强弹头杀伤力 已有4人参与

本报讯据美国物理学家组织网8月11日报道,美国海军研究办公室(ONR)10日对外界公布了一种“革命性的新材料”,该材料能显著增强弹头的杀伤力并有望取代钢成为制造弹头的主要材料。

    通过结合多种金属材料的生产工艺,这种高密度活性材料(HDRM)可大幅增加弹头杀伤力,并适用于大多数武器。不同于常规材料,这种材料制成的弹头能在碰撞或穿透目标表层后继续释放化学能,在一定程度上增加杀伤面积。

    HDRM在强度上与普通铝合金相当,在密度上与低碳钢相当,这使其成为钢构件的理想替代品。这一点非常重要,因为新材料只有在密度上尽可能的与钢类似才能更好的适应现有发射系统并保持较好的精度。

    美国海军研究局项目官员克利福德·贝德福德介绍说,这种新材料在海军导弹中得到了很好应用,不但坚固而且持久性好,能够承受发射时产生的加速度和冲击。在命中目标后,由HDRM制成的弹头碎片不但能刺透目标的表层,还能将燃烧或爆炸保持一段时间。

    由这种新材料制成的武器6月底在美国马里兰州的陆军试验基地进行了试射。美国海军研究局计划在8月中旬再进行一次附加射击测试,而对多个固定目标的大规模测试预计将在9月进行。
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imrsfb

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High-Density Reactive Materials
Reactive material weapon systems can be game-changers for the warfighter. The High-Density Reactive Material Program explores how enhanced potential energy density and energy coupled to the target will create new damage paradigms. Use of this technology can produce tailored energetic effects suitable to counter both conventional threats and peer-level challenges. The “tailoring” of a reactive material weapon system will depend upon the ability to understand and describe the properties of the reactive materials. Material tailoring will require macroscopic mechanical and chemical models, understanding of molecule dynamics, and developing strength/reactivity correlations. The impact on reaction mechanisms of varying material manufacturing methods must be determined. The strength, density, porosity, fracture, and aging will all impact the reaction and therefore the weapon’s effectiveness.
http://www.onr.navy.mil/Science- ... tive-Materials.aspx

Reactive material-from wiki
Fragments or projectiles made of such materials have therefore greater damaging effect than inert ones, with expected lethality increase up to 500%.

The material classes under investigation are thermites, intermetallic compounds, metal-polymer mixtures (e.g. magnesium/teflon/viton-like), metastable intermolecular composites (MIC), matrix materials, and hydrides.[1] These materials must be strong enough to act as structural components, be sufficiently stable to survive handling and launch, to penetrate a target, and sufficiently unstable to reliably ignite on impact.

The mixtures under investigation include one or more finely powdered (down to nanoparticle size) metalloids or metals like aluminium, magnesium, zirconium, titanium, tungsten, tantalum, or hafnium, with one or more oxidizers like teflon or other fluoropolymer, pressed or sintered or bonded by other method to a compact, high-density mass. To achieve a suitable reaction rate and insensitivity to impact, friction, and electrostatic discharge, fuel particles have sizes usually between 1-250 µm.[2][3] A standard composition is aluminium-teflon (Al-PTFE).

Metals which can form intermetallic compounds by an exothermic reaction are another class of candidate materials. An example is a laminate of thin alternating layers of aluminum and nickel, commercially available as NanoFoil.
2楼2011-08-31 20:28:18
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imrsfb

铁杆木虫 (著名写手)

帖子真精彩!
已经收录到淘贴专辑《材料科学最新前沿热点
3楼2011-08-31 20:28:34
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tanchengwen

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小木虫(金币+0.5):给个红包,谢谢回帖
对此问题感兴趣,可有更多信息?
4楼2011-09-02 11:00:47
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czyu

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可有更多信息?
5楼2011-09-02 15:49:23
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麦客001

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真精彩!
6楼2011-09-10 00:55:29
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