Professor Kenya Moore de Almeida Dias da Cunha was a Brazilian nuclear physicist who dedicated her entire life to the study of actinide materials and in the academic education and scientific initiation of the next generation of research scientists. She was a lovely and passionate experimental scientist -- to the best definition of the term … Continue reading An entire life dedicated to nuclear radiation physics and mentorship
The sun is in a new solar cycle, with space weather experts expecting geomagnetic storms to worsen and increase the risk to valuable satellites. — Read on http://www.cnbc.com/amp/2022/02/09/why-solar-geomagnetic-storms-destroy-satellites-like-spacex-starlink.html
I was sitting at my desk in the E ring of the Pentagon only a short stroll from the office of the Secretary of Defense. It was in February 1985 and …A Close Encounter 2.0
Telling false stories has become a subject of increasing media in the past couple of years. “The Washington Post” has made a full-time job of keeping…Liars, Truth Tellers and Bullshit Artists
Ceramics are known to amorphise under energetic particle irradiation. We show Cr2AlC MAX phase -- even in its non-pure semi-crystalline form -- can resist to amorphisation when in its grain-size falls into the nanocrystalline regime (10-100 nm)! Free access at: https://doi.org/10.1126/sciadv.abf6771
An important work by Arregui-Mena et al. demonstrating the manisfestation of cracks in nuclear grade graphite and how to characterise them using transmission electron microscopy. Free access over 50 days! https://doi.org/10.1016/j.matdes.2021.109673
Important thoughts about “high-entropy” alloys…
I have been publishing articles about high-entropy alloys since 2018, the image I chose to illustrate this post is taken from this first article and I will tell you more about it soon. First, however, I have to tell you how I got involved with the subject.
My first contact with high-entropy alloys was with a presentation by Easo George in the Intermetallics2013 conference. In this presentation George showed that the famous Cantor alloy decomposed precipitating intermetallic compounds if subject to long-term annealing at moderate temperatures.
I must confess I had never heard about high-entropy alloys since then, so I asked a colleague during the coffee break after this presentation (I have no recollection who it was) what was this thing of the high-entropy alloys and this colleague explained to me how the configurational entropy of multicomponent alloys in equimolar compositions would stabilize simple solid solutions. I heard politely the…
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In late 1970s and during 1980s, scientific research on the development of voids and inert gas bubbles in solids – often caused by activation and transmutation of some elements within the context of nuclear materials – was intense and most of the consolidated knowledge on this field is due professors Tom van Den, John H. … Continue reading Three generations of nuclear materials research!
Materials at Extremes 