Feasibility of Producing Dispersion Strengthened Chromium by Ball-milling in Hydrogen Halides
Alan Arias
Jan 1968 · National Aeronautics and Space Administration
Ebook
34
Pages
About this ebook
Chromium, with and without 4 volume percent thoria, and nickel powders were ground to fine powder sizes by ball-milling in gaseous hydrogen halides. After reducing the milled chromium in flowing hydrogen under pulsating pressure at about 680 deg C submicron-size powders with 4 to 500 ppm residual halogens were obtained. The compacted chromium-thoria alloys had interparticle spacings ranging from 2. 1 to 6. 5 micrometers. After 100 hours at 1318 deg C the interparticle spacing of the 2. 1-micrometer alloy increased to 5.2 micrometers. Submicron-size chromium and nickel powders were also obtained by pulsating hydrogen reduction of their chlorides.
Rate this ebook
Tell us what you think.
Reading information
Smartphones and tablets
Install the Google Play Books app for Android and iPad/iPhone. It syncs automatically with your account and allows you to read online or offline wherever you are.
Laptops and computers
You can listen to audiobooks purchased on Google Play using your computer's web browser.
eReaders and other devices
To read on e-ink devices like Kobo eReaders, you'll need to download a file and transfer it to your device. Follow the detailed Help Center instructions to transfer the files to supported eReaders.
