【摘 要】
:
To explore the relationship between the chemical bonding and mechanical properties for germanium carbide (Ge1-xCx) films, the Ge1-xCx films are prepared via rea
【机 构】
:
Dept. of Materials Science
【基金项目】
:
from MOE, the \"211\" and \"985\" Project of Jilin University, China;the special Ph.D. Program;国家自然科学基金;the program for Changjiang Scholars and Innovative Research Team in University, and Scie
论文部分内容阅读
To explore the relationship between the chemical bonding and mechanical properties for germanium carbide (Ge1-xCx) films, the Ge1-xCx films are prepared via reactive magnetron sputtering in a mixture of CH4/Ar discharge, and their composition, chemical bonding and hardness were investigated as a function of substrate temperature (Ts). The results show that Ts remarkably influences the chemical bonding Of Ge1-xCx film, which results in a pronounced change in the film hardness. As Ts increases from ambient (60 ℃) to 500 ℃, the Ge content in the film gradually increases, which promotes forming sp3 C-Ge bends in the film at the expense of sp2C-C bonds. Furthermore, it is found that with increasing T, the fraction of C-H bends in Ge1-xCx film gradually decreases, which is attributed to an enhancement in the desorption rate of C-Hn (n =1, 2, 3) species decomposed from methane. The transition from graphite-like sp2 C-C to diamond-like sp3C-Ge bonds as well as the reduction in C-H bonds in the film with increasing Ts promotes forming the compact three-dimensional network structure, which significantly enhances the hardness of the film from 5.8 to 10. 1 GPa.
其他文献
An adaptive morphological impulses extraction method (AMIE) for beating fault diagnosis is proposed.This method uses the morphological closing operation with a
Numerical properties of the time integration method proposed by the first author of this paper in 2007 are the same as those of the constant average acceleratio
Helper-thread of a task can hide the memory access time of irregular data on the chip muhi-core processor (CMP). For constructing a compiler that effectively su
SiO2 aerogels were produced from tetraethyl orthosilicate (TEOS) as silicon resources, ethanol as solvent and watery HCl or ammonia by sol-gel method and surfac
This paper describes analytical and numerical methods to analyze the steady state periodic response of an oscillator with symmetric elastic and inertia nonlinea
Synthesis and kinetics of dichloro-methoxybenzenes were studied from 1,2,4-trichlorobenzene and sodium methoxide in a temperature range of 353-383 K. Effects of
The effects of olefins were quantified by measuring the decreased amount of thiophenes removed by modified zeolites with an increasing olefin concentration in m
Photocatalytic reduction of 6-chloro-3-nitrotoluene-4-sulfonic acid (CNSA) was studied in UV-irradiated TiO2 suspensions in the presence of methanol and surfact
In the present research, the Sb-alloying method was adopted, and the grain refinement and tensile. properties of as-cast Mg-10Zn-5AI alloys with varying Sb addi
The independent continuous mapping(ICM) method is integrated into element free Galerkin method and a new implementation of topology optimization for continuum s