The di-aromatics base oil and graphite powder,blended with the viscosity index improver,and the anti-oxidant and rheological additive,were used to prepare a kind of anti-seize thread lubricant.Its physical chemistry p...The di-aromatics base oil and graphite powder,blended with the viscosity index improver,and the anti-oxidant and rheological additive,were used to prepare a kind of anti-seize thread lubricant.Its physical chemistry properties,such as water resistance,thermal oxidation and aging properties,and tribological performance,were evaluated and compared with those of some commercial products.The results show that the overall performance of the anti-seize thread lubricant could meet the level of some commercial products,while its some properties such as thermal stability,anti-wear and anti-friction properties were better.The said anti-seize thread lubricant is more suitable for use under high temperature conditions.展开更多
Pressure can shorten the distance between molecules or atoms,which can change the periodicity of elements and provide more unprecedented novel materials.In order to produce substances that can remain stable or metasta...Pressure can shorten the distance between molecules or atoms,which can change the periodicity of elements and provide more unprecedented novel materials.In order to produce substances that can remain stable or metastable under an atmospheric pressure,pressure has become an indispensable and powerful means.Recent research suggests that high-pressure synthesis methods have unlimited potential in different research fields.For example,high T_(c)(transition temperature)superconductors with a transition temperature of up to 250 K and super-hard nano-diamonds(NDs)with a hardness of 1 TPa can be synthesized under high-temperature and high-pressure(HTHP)conditions,and these materials cannot be achieved by other synthetic methods.Many recent research achievements involve the synthesis of some compounds with special structures and properties,such as high-entropy alloys,non-stoichiometric substances,inert element compounds,and heterostructure nanocrystals.This review will introduce the latest developments in inorganic compounds obtained under high pressure.Materials with different application backgrounds are classified,some materials with high performance or high potential are introduced,and possible synthesis mechanisms are discussed.In the Conclusions section,we summarize research directions in which the field of high-pressure synthesis research may have great breakthroughs in the next few years,and look forward to the future development of high-pressure synthesis methods.展开更多
基金The authors gratefully acknowledge the financial support from the National Science and Technology for Major Project of China(Project No.2019ZX06004002).
文摘The di-aromatics base oil and graphite powder,blended with the viscosity index improver,and the anti-oxidant and rheological additive,were used to prepare a kind of anti-seize thread lubricant.Its physical chemistry properties,such as water resistance,thermal oxidation and aging properties,and tribological performance,were evaluated and compared with those of some commercial products.The results show that the overall performance of the anti-seize thread lubricant could meet the level of some commercial products,while its some properties such as thermal stability,anti-wear and anti-friction properties were better.The said anti-seize thread lubricant is more suitable for use under high temperature conditions.
基金supported by the National Natural Science Foundation of China(no.21271082 and 21371068).
文摘Pressure can shorten the distance between molecules or atoms,which can change the periodicity of elements and provide more unprecedented novel materials.In order to produce substances that can remain stable or metastable under an atmospheric pressure,pressure has become an indispensable and powerful means.Recent research suggests that high-pressure synthesis methods have unlimited potential in different research fields.For example,high T_(c)(transition temperature)superconductors with a transition temperature of up to 250 K and super-hard nano-diamonds(NDs)with a hardness of 1 TPa can be synthesized under high-temperature and high-pressure(HTHP)conditions,and these materials cannot be achieved by other synthetic methods.Many recent research achievements involve the synthesis of some compounds with special structures and properties,such as high-entropy alloys,non-stoichiometric substances,inert element compounds,and heterostructure nanocrystals.This review will introduce the latest developments in inorganic compounds obtained under high pressure.Materials with different application backgrounds are classified,some materials with high performance or high potential are introduced,and possible synthesis mechanisms are discussed.In the Conclusions section,we summarize research directions in which the field of high-pressure synthesis research may have great breakthroughs in the next few years,and look forward to the future development of high-pressure synthesis methods.
