NASA Low Outgassing for Materials In Space | Chomerics скачать в хорошем качестве

NASA Low Outgassing for Materials In Space | Chomerics

Outgassing may be one of the most common drivers for space applications and is critical for several reasons. Outgassing is a property of materials in vacuum environments to release their constituent materials. These materials or substances can include water vapor, additives, oils, or any other byproduct of the manufacturing process. When these materials are released and condense on nearby surfaces, they can be detrimental to high sensitivity optical equipment or other electronics. Outgassing is tested using the steps in ASTM spec E595. During this test, materials are placed in a vacuum environment and held at a constant temperature of 125 degrees C for a 24-hour period. After the vacuum and heat exposure, there are two primary factors that are measured, Total Mass Loss, referred to by the acronym TML and Collected Volatile Condensable Materials, referred to by the acronym CVCM. Total Mass Loss is the percentage of the original mass the material has lost during the 24-hour testing period. For a material to qualify as Low Outgassing by NASA, it must have a TML of less than 1%, meaning it has lost less than 1% of its total weight. CVCM is the percentage of total weight of the material that has condensed on a specially designed condensing plate and must be less than 0.1% of the initial material mass. Before testing, some materials can undergo a process known as post-baking to help them pass outgassing. Basically, materials are exposed to higher temperatures such as 150C in order to bake out materials before the 24 hours test period. Examples of materials that pass low outgassing requirements and are often used in space applications are: conductive elastomers, thermal GEL s and gap pads, metal mesh gaskets, conductive heat-shrinkable tubing, and conductive foil tapes, both with and without pessure sensitive adhesive. Liked this video? Watch the whole webinar: https://prker.co/3ntUhVf *** ▬Parker Chomerics ▬▬▬▬▬▬▬▬▬▬ The global leader in EMI shielding and thermal interface materials. WEBSITE: https://prker.co/3x7DNVV TWITTER: https://prker.co/3clnXOg LINKEDIN: https://prker.co/2SaEUnU SUBSCRIBE to our e-newsletter: https://prker.co/3wYFchD" ▬ Social Media ▬▬▬▬▬▬▬▬▬▬ Parker Hannifin All Social Media: http://parker.com/social Twitter at   / parkerhannifin   Facebook at   / parkerhannifin   LinkedIn at   / parker-hannifin   Instagram at   / parkerhannifin   Subscribe to Parker's Technology Blog at https://blog.parker.com/site/usa/ ▬ About Parker Hannifin: ▬▬▬▬▬▬▬▬▬▬ Parker Hannifin is a Fortune 250 global leader in motion and control technologies. For more than a century, the company has been enabling engineering breakthroughs that lead to a better tomorrow. The company's products are vital to virtually everything that moves or requires control, including the manufacture and processing of raw materials, durable goods, infrastructure development and all forms of transport. Key technology areas are aerospace, climate control, electromechanical, filtration, fluid and gas handling, hydraulics, pneumatics, process control, sealing and shielding and human motion. Traded on the New York Stock Exchange under the symbol "PH,"​ Parker is strategically diversified, value-driven and well-positioned for global growth as the industry consolidator and supplier of choice. http://parker.com https://investors.parker.com/ #nasa #parkerhannifin #outgassing