Le forum de la musique ancienne
Des claviers du clavecin au clavier de l'ordinateur, un lieu d'échange pour ceux qui aiment la musique ancienne et classique, ainsi que pour ceux qui la pratiquent, dans un esprit de discussion ouverte, d'entraide et de solidarité
 FAQFAQ   RechercherRechercher   MembresMembres   GroupesGroupes 
 S’enregistrerS’enregistrer    ConnexionConnexion 

Allen Crabbe Jersey
Poster un nouveau sujet   Répondre au sujet
   Le forum de la musique ancienne Index du Forum  .::. Faites-vous connaître!  .::. Annoncez vos CONCERTS

Sujet précédent .::. Sujet suivant  
Auteur Message

Hors ligne

Inscrit le: 10 Avr 2018
Messages: 296

Message Posté le : Ven 31 Aoû - 02:31 (2018)    Sujet du message : Allen Crabbe Jersey Répondre en citant

CERAMICS is easy to break and aluminum is easy to bend — or so many people believe.

But a team at Shanghai Jiao Tong University announced yesterday that after nearly 30 years of research they had blended the two materials together to create a new substance with a strength and rigidity that is even stronger than titanium alloy.

The composite called “alumics?” is now being tested in C919 jets and Geely automobiles http://www.ducksauthority.com/authentic-teemu-selanne-ducks-jersey/ , and is expected to help industries like aviation, automobile and high-speed rail develop into a new era of lighter and more energy-saving products.

Aluminum is one of the most commonly used light metals because of its tenacity and aluminum alloy has been incorporated into handsets and computers to make them light and portable.

But aluminum is easily bent. To make it stiffer, researchers have tried adding ceramics.

“Ceramics is fragile in many people’s mind, but its rigidity is actually even better than steel,” said Wang Haowei, a professor at Jiao Tong’s School of Material Science and Engineering who leads the alumics team.

A method commonly across the world is to make particles or fibers out of ceramics and then add them into the aluminum alloy.

This does add strength and rigidity to the materials http://www.ducksauthority.com/authentic-scott-niedermayer-ducks-jersey/ , but the particles are large and the blended materials show difficulty in molding, low strength, poor plasticity and unstable quality, which keep them away from industrial application, according to Wang.

“Since it’s not a feasible way, we thought up a new method — growing ceramics in aluminum to create a nanometer material http://www.ducksauthority.com/authentic-sami-vatanen-ducks-jersey/ ,” he said.

Their work follows a method initiated 25 years ago by Wu Renjie, founder of the university’s State Key Laboratory of Metal Matrix Composites.

“In metal metallurgy, nonmetal things are usually treated as impurities and should be get rid of,” said Wang. “But we found in our researches that they can also play favorable roles if we control the sizes, shapes and distribution of these particles by controlling chemical reaction process.”

Synthesized by a melt reaction composition, the aluminum-ceramics composites causes the ceramics particles to be reduced to a nanometer level to break through the bottlenecks of poor plasticity and processing difficulty.

The new composites are light http://www.ducksauthority.com/authentic-sam-steel-ducks-jersey/ , strong, rigid, heat-resistant and anti-corrosive. Their strength and rigidness has proved to be better than titanium alloy.

The new material has been used in military and aerospace industries in recent years.

Wang said the material can help, for example, to reduce the weight of planes, cars http://www.ducksauthority.com/authentic-ryan-miller-ducks-jersey/ , trains and bikes.

The team is cooperating with the Commercial Aircraft Corporation of China and AECC Commercial Aircraft Engine Co to apply alumics on China’s domestically made planes, according to Wang.

Wu Guanghui, chief designer of China’s self-developed jet C919 and deputy general manager of COMAC, said his company had found effective results in tests of sections made from alumics.

Wu, who helped name the new material, said aviation technology has developed as material development improved.

“Alumics is very suitable in making narrow-body jets like C919 http://www.ducksauthority.com/authentic-ryan-kesler-ducks-jersey/ , while carbon fiber composites are more suitable for wide-body planes,” said Wu.

On Friday, Jiao Tong signed a contract with the government of Huaibei City of Anhui Province, Shanghai Junyao (Group) Co and the Anhui Xiangbang Composite Co to establish an alumics innovation center to promote civil use of the material.

CANBERRA, July 18 (Xinhua) -- Australian Prime Minister Tony Abbott has described as a "terrible tragedy" the shooting down of Malaysia Airlines flight MH17 that has claimed the lives of as many as 27 Australians.

Speaking on radio on Friday morning, Abbott said it seemed certain that the Malaysia Airlines plane had been "shot down http://www.ducksauthority.com/authentic-ryan-getzlaf-ducks-jersey/ ," saying if this was the case it would be an "unspeakable crime."

"If it does turn out that this aircraft was brought down by a surface-to-air missile, there is no doubt this would be,under those circumstances, an unspeakable crime and the perpetrators should swiftly be brought to justice," he said.

However, he emphasized that there were no hard facts at the moment.

The plane was en route to Kuala Lumpur from Amsterdam when it is believed to have been brought down over separatist-controlled eastern Ukraine.

Dutch authorities have confirmed 27 Australians were among the 298 passengers on board the plane http://www.ducksauthority.com/authentic-rickard-rakell-ducks-jersey/ , but Abbott said the Department of Foreign Affairs and Trade in Canberra had still only confirmed the presence of 23 Australians on the plane.

Some of the passengers were due to fly onwards to Melbourne, many of them to attend next week's international AIDS conference in the city.

The prime minister offered his deepest condolences to the families and friends of the people involved in what he said was a "terrible tragedy."

"We can assure families that, at the highest levels of government, we feel for them, we grieve with them and we pray for them," he said on Friday.

"That's the first thing we do. The second thing is to try to provide whatever practical assistance we can http://www.ducksauthority.com/authentic-reto-berra-ducks-jersey/ , in terms of counsel and the repatriations of remains and so on."

The National Security Committee of Cabinet, made up of Abbott, National Party leader Warren Truss, Foreign Affairs Minister Julie Bishop, Federal Treasurer Joe Hockey, Attorney General George Brandis http://www.ducksauthority.com/authentic-paul-kariya-ducks-jersey/ , Defense Minister David Johnston and Immigration Minister Scott Morrison, will meet in Canberra on Friday morning to discuss the incident. Abbott told Fairfax Radio 3AW on Friday that if the plane had been shot down by a missile supplied by Russia, then "Russia bears a heavy share of responsibility" for the disaster.

Coalition frontbencher Christopher Pyne said the fate of MH17 appeared to be a "random event" amid the ongoing separatist dispute in the Ukraine.

"There's no doubt the pl.

Revenir en haut


Message Posté le : Ven 31 Aoû - 02:31 (2018)    Sujet du message : Publicité

PublicitéSupprimer les publicités ?
Revenir en haut

   Le forum de la musique ancienne Index du Forum .::. Annoncez vos CONCERTS
Poster un nouveau sujet   Répondre au sujet
Page 1 sur 1
Toutes les heures sont au format GMT + 1 Heure
Montrer les messages depuis :   

Sauter vers :  

Index | Panneau d’administration | Creer un forum | Forum gratuit d’entraide | Annuaire des forums gratuits | Signaler une violation | Conditions générales d'utilisation
Powered by phpBB © 2001, 2005 phpBB Group
Traduction par : phpBB-fr.com
Template by .: SGo :.