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氮化硼增强对提高钛的高温抗氧化性的影响。

Influence of boron nitride reinforcement to improve high temperature oxidation resistance of titanium.

作者信息

Avila Jose D, Bandyopadhyay Amit

机构信息

W. M. Keck Biomedical Materials Research Lab, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, USA.

出版信息

J Mater Res. 2019 Apr 15;34(7):1279-1289. doi: 10.1557/jmr.2019.11. Epub 2019 Feb 18.

DOI:10.1557/jmr.2019.11
PMID:31406396
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6690614/
Abstract

Influence of boron nitride (BN) addition in commercially pure titanium (Cp-Ti) was characterized for their microstructural variation, hardness and oxidation kinetics. Feedstock powders Cp-Ti with 3 wt.% BN (3BN) and 6 wt.% BN (6BN) were prepared by roller mill followed by additive manufacturing using laser engineered net shaping (LENS™). Rate of oxidation was measured from thermogravimetric analysis (TGA) at 1000°C for 50 h. Average instantaneous parabolic constants ( ) for Cp-Ti, 3BN and 6BN were 41.2±12.0, 28.6±2.8 and 18.2±9.2 mg·cm·h, respectively. Cp-Ti displayed acicular α-Ti microstructure. After TGA, large equiaxed grains along with TiO formation at the grain boundaries was observed, which increased the hardness. With BN addition, plate-like TiN and needle-like TiB secondary phases were also observed. Hardness for Cp-Ti, 3BN and 6BN were 256.9, 424.0 and 548.3 HV, respectively. Overall, a small addition of BN was effective in improving the oxidation resistance of Cp-Ti.

摘要

研究了在工业纯钛（Cp-Ti）中添加氮化硼（BN）对其微观结构变化、硬度和氧化动力学的影响。通过辊磨制备了含3 wt.% BN（3BN）和6 wt.% BN（6BN）的原料粉末Cp-Ti，随后使用激光工程净成形（LENS™）进行增材制造。通过热重分析（TGA）在1000°C下测量50小时的氧化速率。Cp-Ti、3BN和6BN的平均瞬时抛物线常数（ ）分别为41.2±12.0、28.6±2.8和18.2±9.2 mg·cm·h。Cp-Ti呈现针状α-Ti微观结构。热重分析后，观察到沿晶界形成了大的等轴晶粒以及TiO，这增加了硬度。添加BN后，还观察到板状TiN和针状TiB第二相。Cp-Ti、3BN和6BN的硬度分别为256.9、424.0和548.3 HV。总体而言，少量添加BN可有效提高Cp-Ti的抗氧化性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/60193c4f7867/nihms-1518428-f0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/a78b6c48db3a/nihms-1518428-f0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/ba6df7dc9ad4/nihms-1518428-f0002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/14c0d92038d3/nihms-1518428-f0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/26401c8be55b/nihms-1518428-f0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/d86ecb7b3ea9/nihms-1518428-f0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/8c3ac16dc20c/nihms-1518428-f0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/60193c4f7867/nihms-1518428-f0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/a78b6c48db3a/nihms-1518428-f0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/ba6df7dc9ad4/nihms-1518428-f0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/cec0436e0d2b/nihms-1518428-f0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/adfc48721d6e/nihms-1518428-f0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/14c0d92038d3/nihms-1518428-f0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/26401c8be55b/nihms-1518428-f0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/d86ecb7b3ea9/nihms-1518428-f0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/8c3ac16dc20c/nihms-1518428-f0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/924e/6690614/60193c4f7867/nihms-1518428-f0009.jpg

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