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	<title>Comments on: Glass nanolattice structures are four times higher in strength but five times lower in density than steel</title>
	<atom:link href="https://www.isegoria.net/2023/08/glass-nanolattice-structures-are-four-times-higher-in-strength-but-five-times-lower-in-density-than-steel/feed/" rel="self" type="application/rss+xml" />
	<link>https://www.isegoria.net/2023/08/glass-nanolattice-structures-are-four-times-higher-in-strength-but-five-times-lower-in-density-than-steel/</link>
	<description>From the ancient Greek for equality in freedom of speech; an eclectic mix of thoughts, large and small</description>
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	<item>
		<title>By: Adept</title>
		<link>https://www.isegoria.net/2023/08/glass-nanolattice-structures-are-four-times-higher-in-strength-but-five-times-lower-in-density-than-steel/comment-page-1/#comment-3617466</link>
		<dc:creator>Adept</dc:creator>
		<pubDate>Sun, 13 Aug 2023 15:14:12 +0000</pubDate>
		<guid isPermaLink="false">https://www.isegoria.net/?p=50342#comment-3617466</guid>
		<description><![CDATA[“Does this mean they can make phone screens that won’t crack?”

Afraid not. The material in question is still brittle and would surely have undesirable optical properties. Besides, the discoverers have yet to make a sample large enough to be seen without a microscope (the largest sample they produced was 8µm in diameter, with most clustering around 3µm), and it remains unclear whether nano-lattice materials can be made in bulk at all, as a practical matter.]]></description>
		<content:encoded><![CDATA[<p>“Does this mean they can make phone screens that won’t crack?”</p>
<p>Afraid not. The material in question is still brittle and would surely have undesirable optical properties. Besides, the discoverers have yet to make a sample large enough to be seen without a microscope (the largest sample they produced was 8µm in diameter, with most clustering around 3µm), and it remains unclear whether nano-lattice materials can be made in bulk at all, as a practical matter.</p>
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	<item>
		<title>By: Michael van der Riet</title>
		<link>https://www.isegoria.net/2023/08/glass-nanolattice-structures-are-four-times-higher-in-strength-but-five-times-lower-in-density-than-steel/comment-page-1/#comment-3617179</link>
		<dc:creator>Michael van der Riet</dc:creator>
		<pubDate>Fri, 11 Aug 2023 16:19:39 +0000</pubDate>
		<guid isPermaLink="false">https://www.isegoria.net/?p=50342#comment-3617179</guid>
		<description><![CDATA[Does this mean they can make phone screens that won&#039;t crack?]]></description>
		<content:encoded><![CDATA[<p>Does this mean they can make phone screens that won&#8217;t crack?</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Adept</title>
		<link>https://www.isegoria.net/2023/08/glass-nanolattice-structures-are-four-times-higher-in-strength-but-five-times-lower-in-density-than-steel/comment-page-1/#comment-3617167</link>
		<dc:creator>Adept</dc:creator>
		<pubDate>Fri, 11 Aug 2023 14:34:41 +0000</pubDate>
		<guid isPermaLink="false">https://www.isegoria.net/?p=50342#comment-3617167</guid>
		<description><![CDATA[There&#039;s some PR sleight-of-hand in play here: They&#039;re talking about compressive yield strength -- not tensile strength -- so &quot;4x stronger than steel&quot; isn&#039;t saying very much, as steel isn&#039;t a very strong material in compression.

In general, ceramics and glasses (both traditional silica glasses and new metallic glasses) all have very high compressive strengths, but very poor tensile strengths.  Martensitic steel can combine decent compressive strength with outstanding tensile strength -- and, to simplify things a bit, it&#039;s tensile strength which basically corresponds to &quot;damage tolerance&quot; and &quot;resistance to brittle failure.&quot;

They&#039;re also looking at an extremely small sample size that might not scale. Frankly, I&#039;m unaware of any nano-lattice material in use towards any application.

What they&#039;ve done is taken an existing silica glass -- a material traditionally very strong in compression -- and they&#039;ve structured it so that their sample is a lattice of very narrow struts.  This both reduced the defect rate in the glass and enabled them to remove some material, lowering density and improving specific strength.

Ultimately, it&#039;s cool as a scientific curiosity and a work of engineering ingenuity, but it has no near-term practical applications, and it&#039;s not stronger in compression than existing ceramic materials.  (e.g. silicon carbide, which has a pretty much identical compressive strength.)]]></description>
		<content:encoded><![CDATA[<p>There&#8217;s some PR sleight-of-hand in play here: They&#8217;re talking about compressive yield strength &#8212; not tensile strength &#8212; so &#8220;4x stronger than steel&#8221; isn&#8217;t saying very much, as steel isn&#8217;t a very strong material in compression.</p>
<p>In general, ceramics and glasses (both traditional silica glasses and new metallic glasses) all have very high compressive strengths, but very poor tensile strengths.  Martensitic steel can combine decent compressive strength with outstanding tensile strength &#8212; and, to simplify things a bit, it&#8217;s tensile strength which basically corresponds to &#8220;damage tolerance&#8221; and &#8220;resistance to brittle failure.&#8221;</p>
<p>They&#8217;re also looking at an extremely small sample size that might not scale. Frankly, I&#8217;m unaware of any nano-lattice material in use towards any application.</p>
<p>What they&#8217;ve done is taken an existing silica glass &#8212; a material traditionally very strong in compression &#8212; and they&#8217;ve structured it so that their sample is a lattice of very narrow struts.  This both reduced the defect rate in the glass and enabled them to remove some material, lowering density and improving specific strength.</p>
<p>Ultimately, it&#8217;s cool as a scientific curiosity and a work of engineering ingenuity, but it has no near-term practical applications, and it&#8217;s not stronger in compression than existing ceramic materials.  (e.g. silicon carbide, which has a pretty much identical compressive strength.)</p>
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	<item>
		<title>By: Bomag</title>
		<link>https://www.isegoria.net/2023/08/glass-nanolattice-structures-are-four-times-higher-in-strength-but-five-times-lower-in-density-than-steel/comment-page-1/#comment-3617102</link>
		<dc:creator>Bomag</dc:creator>
		<pubDate>Fri, 11 Aug 2023 01:03:58 +0000</pubDate>
		<guid isPermaLink="false">https://www.isegoria.net/?p=50342#comment-3617102</guid>
		<description><![CDATA[&lt;i&gt;”A flawless cubic centimeter of glass can withstand 10 tons of pressure, more than three times the pressure that imploded the Oceangate Titan submersible near the Titanic last month.”&lt;/i&gt;

Makes it sound weak.  A cubic centimeter of steel would be in the 50 ton range.

Depends on the geometry.]]></description>
		<content:encoded><![CDATA[<p><i>”A flawless cubic centimeter of glass can withstand 10 tons of pressure, more than three times the pressure that imploded the Oceangate Titan submersible near the Titanic last month.”</i></p>
<p>Makes it sound weak.  A cubic centimeter of steel would be in the 50 ton range.</p>
<p>Depends on the geometry.</p>
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	<item>
		<title>By: Handle</title>
		<link>https://www.isegoria.net/2023/08/glass-nanolattice-structures-are-four-times-higher-in-strength-but-five-times-lower-in-density-than-steel/comment-page-1/#comment-3617089</link>
		<dc:creator>Handle</dc:creator>
		<pubDate>Thu, 10 Aug 2023 21:58:00 +0000</pubDate>
		<guid isPermaLink="false">https://www.isegoria.net/?p=50342#comment-3617089</guid>
		<description><![CDATA[&quot;What happens when it gets wet?&quot;

What happens when windows get wet?  

Or sand?  Or your wine glass or labware?  

Nothing.  Awesome are the silicates.

Anyway, unlikely that water could permeate far into something with that small a structure.  Even as big as 5 microns, the pores on a fine fritted glass filter barely let water through without additional pressure.  Related to why water slowly gets trapped in (alumino)silicate molecular sieves.

Also, DNA is made to work in cells which are always wet.

Also, nucleic acids aren&#039;t too different from amino acids, and of course nature makes tons of light and tough and materials with peptides, sometimes reinforced or as a scaffolding for hard inorganic martial.  Nature got to this trick first.  Like calcium carbonates in shells and bones or hydroxyapatite in dentin in teeth and scales. Not only merely resistant, many creatures obviously live in the water, life came from the water.

Even if I&#039;m wrong about all that, they could just coat the surface of bulk material in polymer or something else waterproof.]]></description>
		<content:encoded><![CDATA[<p>&#8220;What happens when it gets wet?&#8221;</p>
<p>What happens when windows get wet?  </p>
<p>Or sand?  Or your wine glass or labware?  </p>
<p>Nothing.  Awesome are the silicates.</p>
<p>Anyway, unlikely that water could permeate far into something with that small a structure.  Even as big as 5 microns, the pores on a fine fritted glass filter barely let water through without additional pressure.  Related to why water slowly gets trapped in (alumino)silicate molecular sieves.</p>
<p>Also, DNA is made to work in cells which are always wet.</p>
<p>Also, nucleic acids aren&#8217;t too different from amino acids, and of course nature makes tons of light and tough and materials with peptides, sometimes reinforced or as a scaffolding for hard inorganic martial.  Nature got to this trick first.  Like calcium carbonates in shells and bones or hydroxyapatite in dentin in teeth and scales. Not only merely resistant, many creatures obviously live in the water, life came from the water.</p>
<p>Even if I&#8217;m wrong about all that, they could just coat the surface of bulk material in polymer or something else waterproof.</p>
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	<item>
		<title>By: Kilgore Trout</title>
		<link>https://www.isegoria.net/2023/08/glass-nanolattice-structures-are-four-times-higher-in-strength-but-five-times-lower-in-density-than-steel/comment-page-1/#comment-3617088</link>
		<dc:creator>Kilgore Trout</dc:creator>
		<pubDate>Thu, 10 Aug 2023 21:55:53 +0000</pubDate>
		<guid isPermaLink="false">https://www.isegoria.net/?p=50342#comment-3617088</guid>
		<description><![CDATA[&quot;...it’s almost always flawless.&quot;

Almost. The structure is almost finishing collapsing. Send more grant money.]]></description>
		<content:encoded><![CDATA[<p>&#8220;&#8230;it’s almost always flawless.&#8221;</p>
<p>Almost. The structure is almost finishing collapsing. Send more grant money.</p>
]]></content:encoded>
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	<item>
		<title>By: Freddo</title>
		<link>https://www.isegoria.net/2023/08/glass-nanolattice-structures-are-four-times-higher-in-strength-but-five-times-lower-in-density-than-steel/comment-page-1/#comment-3617082</link>
		<dc:creator>Freddo</dc:creator>
		<pubDate>Thu, 10 Aug 2023 21:24:47 +0000</pubDate>
		<guid isPermaLink="false">https://www.isegoria.net/?p=50342#comment-3617082</guid>
		<description><![CDATA[Sounds like a material with a particularly nasty fatigue cycle: perfect for the next Oceangate wannabe.]]></description>
		<content:encoded><![CDATA[<p>Sounds like a material with a particularly nasty fatigue cycle: perfect for the next Oceangate wannabe.</p>
]]></content:encoded>
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	<item>
		<title>By: W2</title>
		<link>https://www.isegoria.net/2023/08/glass-nanolattice-structures-are-four-times-higher-in-strength-but-five-times-lower-in-density-than-steel/comment-page-1/#comment-3617070</link>
		<dc:creator>W2</dc:creator>
		<pubDate>Thu, 10 Aug 2023 18:38:09 +0000</pubDate>
		<guid isPermaLink="false">https://www.isegoria.net/?p=50342#comment-3617070</guid>
		<description><![CDATA[What happens when it gets wet?]]></description>
		<content:encoded><![CDATA[<p>What happens when it gets wet?</p>
]]></content:encoded>
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		<title>By: Michael Towns</title>
		<link>https://www.isegoria.net/2023/08/glass-nanolattice-structures-are-four-times-higher-in-strength-but-five-times-lower-in-density-than-steel/comment-page-1/#comment-3617056</link>
		<dc:creator>Michael Towns</dc:creator>
		<pubDate>Thu, 10 Aug 2023 15:30:12 +0000</pubDate>
		<guid isPermaLink="false">https://www.isegoria.net/?p=50342#comment-3617056</guid>
		<description><![CDATA[Transparent aluminum??!!]]></description>
		<content:encoded><![CDATA[<p>Transparent aluminum??!!</p>
]]></content:encoded>
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