achieving ultralow wear with stable nanocrystalline

The most wear

These wear-resistant materials could potentially provide reliability benefits for a range of devices we have explored, said Chris Nordquist, a Sandia engineer not involved in the study. The opportunities for integration and improvement would be device-specific, but this material would provide another tool for addressing current reliability limitations of metal microelectronic components.

Macroscale superlubricity enabled by graphene nanoscroll

Slip sliding away Many applications would benefit from ultralow friction conditions to minimize wear on the moving parts such as in hard drives or engines. On the very small scale, ultralow friction has been observed with graphite as a lubricant. Berman et al. achieved superlubricity using graphene in combination with crystalline diamond nanoparticles and diamondlike carbon (see the

Tribologically induced amorphization in the subsurface

2019/10/1It fluctuates between 0.7 and 0.8 at the stable stage, which is the representative value for metals during the dry sliding wear tests []. Achieving Ultralow Wear with Stable Nanocrystalline Metals, Advanced Materials Deerfield Beach, Fla. (2018) Google Scholar

Achieving Ultralow Wear with Stable Nanocrystalline

Ultralow wear rates, less than a monolayer of material removed per sliding pass, are measured for Pt–Au thin films at a maximum Hertz contact stress of up to 1.1 GPa. This is the first instance of an all‐metallic material exhibiting a specific wear rate on the order of 10 −9 mm 3 N −1 m −1, comparable to diamond‐like carbon (DLC) and sapphire.

Achieving Ultralow Wear with Stable Nanocrystalline

Achieving ultralow wear rates with metals requires the mitigation of deformation resulting from cyclic applied contact stresses, recent models suggest new thermodynamic routes for achieving stable nanocrystallinity through alloying. 30-32, 41-43 the

Achieving Ultralow Wear with Stable Nanocrystalline

article{osti_1467025, title = {Achieving Ultralow Wear with Stable Nanocrystalline Metals}, author = {Curry, John F. and Babuska, Tomas F. and Furnish, Timothy A. and Lu, Ping and Adams, David P. and Kustas, Andrew B. and Nation, Brendan L. and Dugger, Michael T. and Chandross, Michael and Clark, Blythe G. and Boyce, Brad L. and Schuh, Christopher A. and Argibay, Nicolas}, abstractNote

Combinatorial study of thermal stability in ternary

2020/4/15It exhibits stable nanocrystalline structure (region and structure a) only towards the stabilizing solute (here: Achieving ultralow wear with stable nanocrystalline metals Adv. Mater., 30 (32) (2018), Article 1802026 CrossRef View Record in Scopus F., P. Lu, N.

Lowering coefficient of friction in Cu alloys with stable

Similar behaviors of obvious COF reduction and wear resistance enhancement with the stable GNG surface layers have been observed in other materials including pure copper and stainless steels. Therefore, the finding is generally significant and may find tremendous potential for technological applications in contact loading of metals.

Environment

The macroscale friction and wear properties of the Zr44Cu10Ni10Ti11Be25 metallic glass were investigated as a function of environmental oxygen concentration and contact force. We found remarkably low and predictable friction when both oxidation and frictional heating (that can lead to thermomechanically-driven crystallization) were supressed. Conversely, oxidation and the formation

Ultrastrong low

This idea has been widely adopted in designing stable nanocrystalline alloys (32, 33). The enthalpy of segregation relative to the enthalpy of mixing determines the propensity for segregation. In this work, carbon segregation should have occurred during the grain refinement process due to the high diffusivity of interstitial carbon atoms and the high dislocation density produced by rolling.

Engineers develop world's most wear

Sandia's team recently reported their findings in Advanced Materials (Achieving Ultralow Wear with Stable Nanocrystalline Metals). "We showed there's a fundamental change you can make to some alloys that will impart this tremendous increase in performance over a broad range of real, practical metals," said materials scientist Nic Argibay, an author on the paper.

Effect of applied magnetic field on microstructure of

2018/12/1Achieving ultralow wear with stable nanocrystalline metals Adv. Mater., 30 (2018), Article 1802026 The effect of grain size on the wear properties of electrodeposited nanocrystalline nickel coatings Scr. Mater., 44 (2001), pp. 493-499 Article Download PDF L.

Enhancement of Wear Properties of Ultrafine

An in situ displacement reaction was used to prepare an Al–12 wt% Sn nanocomposite alloy from mechanically alloyed Al–SnO2–MgH2. The nanoscaled Sn phase was mostly 30–50 nm in size and was distributed uniformly in the Al matrix. The wear properties of the Al–SnO2–MgH2 composite were enhanced significantly compared to those of an Al–Sn–MgH2 composite. These improvements

Investigation of Structural and Optical Properties of Nanocrystalline ZnO

Thesis Report Investigation of Structural and Optical Properties of Nanocrystalline ZnO Sajjad Hussain LiTH-IFM-A-EX-08/1928-SE Linkpings UniversitetDatum Date 24/04/2008 Avdelning, institution Division, Department Chemistry Department of Physics

Stability of nanocrystalline metals: The role of grain

2021/3/8Research on nanocrystalline materials over the past several decades has followed a trajectory of increasing stability. The first nanocrystalline materials were produced using exotic, far-from-equilibrium processes such as condensation from inert gases, 1,2 and were so unstable that they could not be produced at full density without triggering grain growth that threatened their nanostructure.

Achieving Ultra

2021/2/12If the discharge temperature gets too high, this will result in lubricant failure, compressor overheating and accelerated wear. When it comes to achieving temperatures below the limits of a standard single-stage refrigeration cycle, two or more additional compression stages are required.

Tribologically induced amorphization in the subsurface

2019/10/1It fluctuates between 0.7 and 0.8 at the stable stage, which is the representative value for metals during the dry sliding wear tests []. Achieving Ultralow Wear with Stable Nanocrystalline Metals, Advanced Materials Deerfield Beach, Fla. (2018) Google Scholar

Nano

2010/5/10There are two ways of achieving ultra high strength in steels. The first one is to reduce the size of a crystal to such an extent that it is devoid of any defects, like in the case of a whisker. Brenner in 1956 could achieve a tensile strength of greater than 13 GPa in an iron whisker.

Combinatorial study of thermal stability in ternary

2020/4/15It exhibits stable nanocrystalline structure (region and structure a) only towards the stabilizing solute (here: Achieving ultralow wear with stable nanocrystalline metals Adv. Mater., 30 (32) (2018), Article 1802026 CrossRef View Record in Scopus F., P. Lu, N.

Achieving Ultralow Wear with Stable Nanocrystalline Metals.

Achieving Ultralow Wear with Stable Nanocrystalline Metals. Curry JF(1), Babuska TF(1), Furnish TA(1), Lu P(1), Adams DP(1), Kustas AB(1), Nation BL(1), Dugger MT(1), Chandross M(1), Clark BG(1), Boyce BL(1), Schuh CA(2), Argibay N(1).

Combinatorial study of thermal stability in ternary

2020/4/15It exhibits stable nanocrystalline structure (region and structure a) only towards the stabilizing solute (here: Achieving ultralow wear with stable nanocrystalline metals Adv. Mater., 30 (32) (2018), Article 1802026 CrossRef View Record in Scopus F., P. Lu, N.

Sandia researchers engineer most wear

2018/8/20More recently, ultralow wear has been achieved in polymer nanocomposites such as PTFE–alumina. As a material class, metals have remained a notable exception to this list. Achieving ultralow wear rates with metals requires the mitigation of deformation resulting from cyclic applied contact stresses, which can lead to evolution of the microstructure, defect nucleation, and eventual

New Platinum

2019/8/26You can read about it in an article entitled "Achieving Ultralow Wear with Stable Nanocrystalline Metals." Here is the key information you need to know. The alloy was developed by researchers from the U.S. Department of Energy working at Sandia National Laboratories in Albuquerque, New Mexico.

Bonded NdFeB Magnets and Assemblies

Bonded NdFeb magnets are usually used as a micro-motor stator or rotor it's magnetized and interacts with the winding coil to form a driving unit.Digital cameras in consumer electronics, camcorders;TV, DVD player, computer, server;Office automation printing

The most wear

These wear-resistant materials could potentially provide reliability benefits for a range of devices we have explored, said Chris Nordquist, a Sandia engineer not involved in the study. The opportunities for integration and improvement would be device-specific, but this material would provide another tool for addressing current reliability limitations of metal microelectronic components.

Environment

The macroscale friction and wear properties of the Zr44Cu10Ni10Ti11Be25 metallic glass were investigated as a function of environmental oxygen concentration and contact force. We found remarkably low and predictable friction when both oxidation and frictional heating (that can lead to thermomechanically-driven crystallization) were supressed. Conversely, oxidation and the formation

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