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- 07-30 Metal Foam as "Low-Temperature Protective Armor" in Liquid Hydrogen Storage & Transportation: Full Analysis of Scientific Principles Liquid hydrogen operates at an ultra-low temperature of -253 °C (20 K), merely 20 degrees above absolute zero. To deliver this ultimate clean fuel from production plants to hydrogen refueling stations and rocket launch pads, every component of the storage and transportation system must withstand extreme cryogenic conditions. Among various engineering materials, metal foams—especially nickel foam—serve as inconspicuous yet critical "low-temperature protective armor"....
- 07-29 What is Metallic Foam? A Complete Guide to the Secrets of Porous Metal Materials When the word "metal" comes to mind, most people picture heavy, rigid solid iron or copper slabs. However, there exists a special type of metal riddled with countless tiny pores, resembling a metal-made sponge — this is metallic foam, also known as porous metal. It combines the mechanical strength of metals with the porous structure of sponges, and is gradually revolutionizing industries ranging from aerospace to consumer electronics.I. Definition of Metallic FoamMe...
- 07-28 The Secret of Vibration & Noise Reduction by Metallic Foam: In-Depth Analysis of Constrained Damping Composite Structures Have you ever wondered why some equipment roars violently during operation while others run nearly silently? The secret often lies not in motors or bearings, but in an inconspicuous functional material — composite damping structures made of metallic foam. This article unveils the underlying physical principles behind metallic foam’s outstanding vibration and noise suppression performance.Ⅰ. Basic Concept: What is Damping?In physics, damping refers to the capacity to convert v...
- 07-27 Performance Requirements of Metallic Foam Cores for Blast-Resistant Doors The metallic foam core inside blast-resistant doors primarily functions to absorb detonation wave energy, dissipate impact kinetic energy, provide auxiliary thermal insulation and flame retardancy, and block flying debris generated after an explosion. Nickel-chromium or nickel-chromium-aluminum alloy foam is the preferred material, while pure nickel foam and pure copper foam are not recommended.Ⅰ. Mechanical Energy Absorption Performance (Most Critical Index)● High ductility ...
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