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Incorporating gases (Ar, H2) in PM HIP canisters, using diffusion-filled microspheres
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
RISE - Research Institutes of Sweden (2017-2019), Materials and Production, KIMAB.
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2018 (English)In: Euro PM 2018 Congress and Exhibition, European Powder Metallurgy Association (EPMA) , 2018Conference paper, Published paper (Refereed)
Abstract [en]

Microspheres are hollow bubbles with a wide range of shell materials available on the market. Gases may enter microspheres via diffusion provided that the temperature is raised. In this paper we used polymeric microspheres to incorporate and control the level of Ar in reference material made by PM HIP, and glass (SiO2) microspheres to incorporate H2 for oxide reduction of PM HIP material. For the incorporation of Ar via polymeric microspheres, we failed to control all factors in the tests with Ar. In spite of that, we can utilize this method to create a homogenous reference material. For the incorporation of H2 via glass (SiO2) microspheres, higher filling pressure is permitted owing to the higher strength of this material. Up to 700 bar filling pressure has been achieved in work aiming for automotive applications. Once the microsphere, after filling, regain room temperature the H2 is locked inside and may be handled safely. We have used this idea to reduce internal and surface oxides on metal powders in the canisters before Hot Isostatic Pressing (HIP), with good results.

Place, publisher, year, edition, pages
European Powder Metallurgy Association (EPMA) , 2018.
Keywords [en]
Argon, Filling, Glass, Hot isostatic pressing, Metal pressing, Polymers, Powder metallurgy, Powder metals, Silica, Automotive applications, Filling pressures, Oxide reduction, Polymeric microsphere, Reference material, Shell materials, Surface oxide, Microspheres
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-44192Scopus ID: 2-s2.0-85079048541ISBN: 9781899072507 (print)OAI: oai:DiVA.org:ri-44192DiVA, id: diva2:1396907
Conference
European Powder Metallurgy Congress and Exhibition, Euro PM 2018, 14 October 2018 through 18 October 2018
Available from: 2020-02-26 Created: 2020-02-26 Last updated: 2020-02-26Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • Other style
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  • de-DE
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  • en-US
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