In Situ Synthesis of （Ti3SiC2+TiB2）p/Al Matrix Composite Coating Fabricated on Ti-6Al-4V Alloy

Li Wei; Zhou Wei; Zhao Yuguang

doi:10.15980/j.tzzz.2019.11.022

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In Situ Synthesis of （Ti₃SiC₂+TiB₂）_p/Al Matrix Composite Coating Fabricated on Ti-6Al-4V Alloy
Vol. 39, Issue 11, Pages: 1235-1239(2019)
Published： 2019 ，
DOI： 10.15980/j.tzzz.2019.11.022

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[1]李伟,周伟,赵宇光.Ti-6Al-4V合金表面原位内生(Ti_3SiC_2+TiB_2)_p/Al基复合材料涂层制备[J].特种铸造及有色合金,2019,39(11):1235-1239.

Li Wei, Zhou Wei, Zhao Yuguang. In Situ Synthesis of （Ti₃SiC₂+TiB₂）_p/Al Matrix Composite Coating Fabricated on Ti-6Al-4V Alloy. [J]. Special Casting & Nonferrous Alloys 39(11):1235-1239(2019)
[1]李伟,周伟,赵宇光.Ti-6Al-4V合金表面原位内生(Ti_3SiC_2+TiB_2)_p/Al基复合材料涂层制备[J].特种铸造及有色合金,2019,39(11):1235-1239. DOI： 10.15980/j.tzzz.2019.11.022.

Li Wei, Zhou Wei, Zhao Yuguang. In Situ Synthesis of （Ti₃SiC₂+TiB₂）_p/Al Matrix Composite Coating Fabricated on Ti-6Al-4V Alloy. [J]. Special Casting & Nonferrous Alloys 39(11):1235-1239(2019) DOI： 10.15980/j.tzzz.2019.11.022.

摘要

在Al-Si-B4C粉末体系下利用低氧压熔结技术成功地在Ti-6Al-4V合金表面制备出原位内生（Ti

SiC

+TiB

）

/Al基复合材料涂层。结果表明

涂层主要由高体积分数的Ti

SiC

和TiB

复合增强体组成的外层及Al

Ti和Al组成的内层所构成

涂层相分层分布明显

Al在制备过程中稀释了各反应物浓度

起到了稀释剂作用

且促进了反应相生成

起到了催化剂作用

降低了生成TiB

、Ti

SiC

反应起始温度

起到了辅助剂作用

消耗了加热环境中残存氧

起到了除氧剂作用

并促进了涂层致密化

起到了填充剂的作用。

Abstract

A coating reinforced with in situ synthesis of Ti

SiC

-TiB

particulates has been fabricated successfully on the Ti-6Al-4V alloy by the low oxygen partial pressure fusing technique in the Al-Si-B

C powders system.The results reveal that the coating consists of two layers

that is the outer layer consists of high volume fraction of Ti

SiC

TiB

and the inner of TiAl

and Al layer with the obvious layered distribution of phase composition.The role of aluminum is served as a diluent agent through decreasing the molar fraction of reactant in slurry

as a activator agent through promoting the coating formation

as a assistant agent through decreasing the reactive temperature for Ti

SiC

formation

as a deoxidant agent through removing the oxygen in heating system

and as a stuffing agent through favoring the densification of coating during the coating fabrication.