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Title: Effect of substrate temperature on sputter-deposited boron carbide films

Journal Article · · Journal of Applied Physics
DOI: https://doi.org/10.1063/5.0074470 · OSTI ID:1861962

Sputter deposition of B4C films with tailored physical properties remains a challenge. Here, we systematically study how substrate temperature influences the properties of B4C films deposited by direct current magnetron sputtering onto planar substrates held at temperatures in the range of 100-510°C. Results show that all films are amorphous stoichiometric B4C, with low O content of ~1 at. %. Films deposited onto substrates at 100°C exhibit high compressive residual stress and decreased mechanical properties. Therefore, for elevated substrate temperatures in the range of 180-510°C, film mass density, surface roughness, Young’s modulus, and hardness are weakly dependent on substrate temperature. However, in this temperature range, an increase in substrate temperature leads to larger residual compressive stress accompanied by a corresponding reduction in the concentration of nanoscale inhomogeneities. At least for the landing atom ballistics conditions studied here, a substrate temperature range of ~185-250°C is optimum for growing films with near-zero intrinsic residual stress. The overall weak substrate temperature dependence of film properties revealed in this work is favorable for the development of a robust deposition process, particularly for the case of deposition onto non-planar substrates where temperature control is often challenging.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233119CNA000063; AC52-07NA27344
OSTI ID:
1861962
Report Number(s):
LLNL-JRNL-827499; 1041766
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 131; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (57)

Conquering the Low‐ k Death Curve: Insulating Boron Carbide Dielectrics with Superior Mechanical Properties journal May 2016
Borides in Thin Film Technology journal October 1997
Short range order structure of amorphous B4C boron carbide thin films journal February 2011
Low-temperature growth of boron carbide coatings by direct current magnetron sputtering and high-power impulse magnetron sputtering journal August 2016
Thermal expansion of boron and boron carbide journal March 1986
Columnar microstructure in vapor-deposited thin films journal December 1977
Algorithms for the rapid simulation of Rutherford backscattering spectra journal June 1985
Properties of RF sputtered B4C thin films journal June 1994
Magnetron sputter deposition of boron and boron carbide journal December 1991
Raman effect of boron carbide (B4.3C to B10.37C) journal March 1994
Boron carbide—A comprehensive review journal January 1990
Process–property relationship of boron carbide thin films by magnetron sputtering journal February 2004
Oblique evaporation and surface diffusion journal August 1997
Structures and properties of disordered boron carbide coatings generated by magnetron sputtering journal November 1998
Mixed Mode Cracking in Layered Materials book January 1991
Microstructure and mechanical properties of boron carbide thin films journal December 2002
Superhard PVD coatings in the B–N–C triangle journal May 1999
Thick boron carbide coatings for protection of tokamak first wall and divertor journal August 1999
Boron carbide thin films deposited by tuned-substrate RF magnetron sputtering journal March 1999
Depth-sensing indentation of low-density brittle nanoporous solids journal July 2009
The influence of residual gas on boron carbide thin films prepared by magnetron sputtering journal September 2011
Mechanical properties and structure of amorphous and crystalline B4C films journal January 2009
A simulation-based and analytic analysis of the off-Hugoniot response of alternative inertial confinement fusion ablator materials journal September 2016
Rapid preparation and uniformity control of B4C ceramic double-curvature shells: Aim to advance its applications as ICF capsules journal September 2018
Probing surface and interface morphology with Grazing Incidence Small Angle X-Ray Scattering journal August 2009
Celebrating the 100th anniversary of the Stoney equation for film stress: Developments from polycrystalline steel strips to single crystal silicon wafers journal January 2009
Stress evolution in B4C and Cr mono-layer and B4C/Cr multilayer films with variable layer thickness for neutron detectors journal March 2013
Boron carbide coating to improve the chemical stability of nm-thick graphite films journal June 2020
Thin Film Materials book July 2010
Linear Thermal Expansion Coefficient of Silicon from 293 to 1000 K journal January 2004
Experiment and simulation of the compositional evolution of Ti–B thin films deposited by sputtering of a compound target journal September 2008
B 4 C thin films for neutron detection journal May 2012
Sputter-deposited low-stress boron carbide films journal November 2020
Oblique angle deposition of boron carbide films by magnetron sputtering journal September 2021
Intrinsic stress in sputter-deposited thin films journal January 1992
Evaluation of Gap Heat Transfer between Boron Carbide Pellet and Cladding in Control Rod of FBR journal February 1992
Stress, Roughness and Reflectivity Properties of Sputter-Deposited B 4 C Coatings for X-Ray Mirrors journal December 2019
Foundations of DC plasma sources journal November 2017
Anomalous Surface Reflection of X Rays journal September 1963
Model for Columnar Microstructure of Thin Solid Films journal March 1986
Columnar Growth in Thin Films. journal April 1988
Columnar growth in thin films journal February 1988
Thin-Film Growth and the Shadow Instability journal February 1989
FitGISAXS : software package for modelling and analysis of GISAXS data using IGOR Pro journal July 2010
The role of trapped Ar atoms in the mechanical properties of boron carbide films deposited by dc-magnetron sputtering
  • Jacobsohn, L. G.; Averitt, R. D.; Nastasi, M.
  • Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 21, Issue 5 https://doi.org/10.1116/1.1593054
journal September 2003
Controlling the B/Ti ratio of TiB x thin films grown by high-power impulse magnetron sputtering
  • Bakhit, Babak; Petrov, Ivan; Greene, J. E.
  • Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 36, Issue 3 https://doi.org/10.1116/1.5026445
journal May 2018
Revised structure zone model for thin film physical structure journal April 1984
Reduction of stress and roughness by reactive sputtering in W/B 4 C multilayer films conference September 2007
Growth and Erosion of Thin Solid Films journal July 1990
High Rate Thick Film Growth journal August 1977
Investigation on Electrical and Optical Properties of Hydrogen Doped Boron Carbide Thin Films journal June 2018
CRC Handbook of Chemistry and Physics book June 2016
NIF Capsule Design Update journal July 1997
Evaluation of B 4 C as an Ablator Material for NIF Capsules journal July 1997
Optical constants of magnetron-sputtered boron carbide thin films from photoabsorption data in the range 30 to 770 eV journal January 2008
An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments journal June 1992
Review of Growth Defects in Thin Films Prepared by PVD Techniques journal May 2020